Hi guys, I played a lot of Olaf recently and since build i use works pretty nice,decided to share it. Note that this is not the only good way to play him and it wont suits all players.
Check it if You like playing aggressively in a mid and late game.


Abilities:

Berserker Rage (Innate): For each 1% of health missing, Olaf's attack speed is increased by 1%.
Undertow (Active): Olaf throws an axe into the ground at a target location, dealing damage to units it passes through and slowing their movement speed for 2.5 seconds. If Olaf picks up the axe, the ability's cooldown is reduced by 6 seconds.
Vicious Strikes (Active): Olaf's attack damage is increased, based on his health, and he gains massive lifesteal and spell vamp.
Reckless Swing (Active): Olaf attacks with such force that it deals true damage to his target and himself.
Ragnarok (Active): Olaf is immune to disables, has increased armor penetration and reduces incoming damage by a flat amount.
Lasts: 5/6.5/8 seconds

Runes:

Go for Armor Penetration marks and quintessences,Mana Regen per lvl seals and flat Cooldown Reduction glyphs

Masteries:

Take 15/0/15:
http://img143.imageshack.us/img143/6166/masteries.jpg

Summoner spells:

Cleanse and ghost,no other.


Abilities:

Max Q,then W, R allways when u can. You can put 1 in E around lvl 7-9 just for that extra damage.

1. Basics strats:

- You will farm like hell with your axe giving you a nice boost of money early on.
- You should be able to push tower after 6-8 mins if you lane with a appropriate tp.
- Then you are free to gank other lanes
- Pushing lanes ALONE and taking towers down
- Killing enemys main DPS in team battles

2. Items:

Main idea is to have enough hp to survive, massive on movement speed to chase enemy champs and some damage,AS and crit chance.

I'd start with Ruby Crystal for that extra hp to let you stay on lane for a long time.
Then go for Boots of Speed and Vampiric Scepter. Most ppl will rush for Phage or fast Starks Favor, but we wont do that. Buy Zeal instead, this item gives you all the best for this build. After that upgrade your boots to Boots of Swiftness and finish Your Phage. Forget about crappy Berserker's Greaves, u ll have enough attack speed from other items and passive, forget Mercury's Treads, you ll have your ulti on and/or cleanse and ghost for cc, we want SPEED! Dont rush for Frozen Mallet just yet , you can easly slow down your opponents by aiming your axe right(and/or getting lizard) instead spend your money on Fort pot and agility pot, add lizard to that and u should be unstoppable by now and You should easly get 2 or even more kills. Finnish Mallet,and by now you should be able to easly determine what to do next by checking your opponents. Most of the time you ll need more Magic Resist, go for Negatron Cloak right away, take Banshee's Veil or Force of Nature later on. If not, take Atma's Impaler for that extra armor, crit chance and damage.
In most games I dont do anything with that Vampiric Scepter but if you have that extra money, go for it just... dont make Stark's Fervor ,its good for support champs,and you are not one of them, let someone else build it.

3. Early game:

Since we have a nice mana regen, we will spam Q a lot. First of all to farm like crazy, and when u max Q its so easy to became a rich berserker very fast. The other reason is to harras your opponents, if they are not carefull, you ll be able to do both in one throw of your massive axe. Try to lane with good ranged champ, like Janna, Ezreal or Ashe, your opponents will forget what last-hitting is and will loose their tower in 6 mins. Remember to heal with your W ability when you have safe access to at least 2 minions. Dont hesitate to farm a bit in jungle before u recall when on low hp, Olafs passive will come in handy here.

4. Mid game:

If you farmed good, you should have some nice items by now, and should try to gank a bit. Take a lizard fast and go on hunting. Dive the turrets with your ulti and ghost, noone can escape that. Stay focused on farming and ganking, always farm a jungle on your way, you can also easly take the dragon down. Best way to do it is to get the golem just before and spam your axe on a 1 sec CD if u stand close enough.
Chech your CD often, play it safe when you dont have your ulti/cleance/ghost on, but if u have them all... find the right time, and start pushing a lane and dont stop. Best part is that even if you get in trouble cleance ghost ulti combo will always let you run away form troubles. In the meantime you will farm a lot, prolly take the tower down and make 3 or more enemy to go back for you and chase you for nothing, while the rest of your team will push hard other lanes. Just make sure your team will hold 4v5 for some time.

5. Late game:

Not much different from above, besides that you ll have to be carefull more as towers wont be enough to support 4v5 when you are backdooring. So you should be more with the rest of the team. Remember about buying fort and agi pots, when you see the battle coming.

6. Teamfights

Always go for that ranged,low hp,staying behind, heavy on dps chicke...er .. champ Like ezreal ryze ashe twitch ect. With your massive speed and dps,while your ulti lasts,noone will stop you,and if thats not enough u still got ghost and cleanse. You should chase and kill anyone above in no time. If most of opponents targeted you while you chase that dps champ, you ll be prolly on low hp, so with your ghost still on ,run the other way(not back into fight),find some creeps and heal fast on them,then rejoin. If you feel you can come back immedietly and survive on your lifesteal, do so.


Well, hope thats helps a bit for those of You who likes playing Olaf. See ya!

EDIT:
I ve found this guide at US forums, its more/less the same as mine,but more "step by step" and includes jungling so i though i d share:
http://www.leagueoflegends.com/board...d.php?t=137838

Familiar, i ve read your guide before i posted mine, and i must say i tried something like that before (and many others). You have to understand that mine build is to execute different strat, there is more than one good way to play Olaf. Also maybe you should try mine before criticising with strong words like stupid etc.

Quote:

Originally Posted by Familiar Mage Olaf does not need CD Glyphs, his Q and E maxed are at 4 seconds.

Why should i? You got AS from masteries and runes, in addition to boots. Still bersekers is a waste of money with my build, i got enough from Zeal->Phanton or even more from Malady if i make it.

just quick question - what about heal + ghost?

Imo heal is decent choice because with it you can choose between going into lane and going to jungle (plus with heal its not obvious and heal still have some value through whole match)

EDIT - nice guide! +

Im glad you like it thx.

I wouldn't consider heal instead of cleanse. Cleanse still has a huge utility, even after nerf. In most cases it will save you more hp than you can get from heal. And in late game heal is pretty useless,since you have so much hp.
Dont forget about lifesteal also, this is your source of healing and its really all you need. You can cleance out of trouble, run to nearest mobs and heal the same amount of hp in few hits of your axe
If you are having troubles with hp and early laning phase, start with dorans shield, you will be a little behind in items but you might make it up by farming more.