For Lanelaf you don't need to build damage to deal tons of it. Your E and Q are more than enough to scare off anyone. This is the reason why you can nearly go full tank.
Gives great lane sustain, and money over time. What else would you want!
Cooldown reduction helps you swing your true damage out faster, health gives some tankyness, and did I mention the active? Not only great for the team to have such an early speed boost, but also awesome for in lane to get away from ganks, or run under the tower to snatch a quick kill.
and any of the following:
You'll have to choose here: What do you need first?
gives such a health boost that is overall a great option (since armor got so expensive in S3 and health is better against AP too).
was a Season2 favorite item as the cooldown reduction was massive for Olaf, armor helps in lane and towerdiving, and mana allows you to throw your axes more often.
is great if you got someone building Frozen Heart already, and rather than reducing enemies AS it gives you a Sheen-like passive that also slows people around the hit target.
why build tanky so early if you're winning your lane already anyway? BC is THE AD-caster item of the year, for it's armor-shredding passive.
Don't worry if you picked the wrong item first, you'll have to build them all anyway later on. It's just that you need to wonder WHAT kind of boost you need early in the game: tankyness or strength.
As you're already in the middle of the teamfight (as usual), helps your teammates quickly close the gap and help you out.
Just an awesome item as it helps you get out of base and back into action after recalling as fast as possible.
Considerable Last Items
Your last choice. Also, if your match took THIS long to get full build - either your enemy hasn't surrendered yet or someone on your team is feeding - HUEHUEHUE. Ahum *resumes being professional about it* Anyway.
is an all-round item which gives you tons of damage - if thats what your team needs.
you aren't fed but your ADc is? This item might be a good choice then - I would'nt buy it if youre with only 2 AD champs though.
Some more armor and health, and an active that slows all enemies around you. If you're always in the middle of the fight thats quite useful.
Don't feel like feeding anymore? Gives some MR and Armor, if the enemy's damage is balanced.