Oh hi, i didn't see you there. Yasuo has been my favourite champion since i started playing League, so this is my guide for him. Hope it help's! P.S this is my first guide, so don't judge if its so simplistic, please :).

You want to get that sweet sweet crit chance for those early trades. Those resistances are going to help you early, and that damage boost is nice.

Warlord's Bloodlust is easily my favourite keystone because I love the healing it gives. Fervor Of Battle is good too because you're going to be autoattacking while you trade, also you're Q counts as a autoattack, which is nice. Thunderlords is also pretty decent because of that extra damage with every third auto/ability you use on an enemy. Grasp is good too because the health and damage you'll be doing/getting is nice for early.

You're passive makes the most at the early game. If an enemy or jungle mobs attack you, you get a shield which lasts for 1 second. Its better than it sounds. In the early game it is exceptionally good for trading! So use that for blocking off poke and trading! E's a must max first, because it gives you some great magic damage and mobility in-lane. Q's second, because it gives some good damage increase, but its too low to max it first. W's third, because it doesn't do anything but lower the cooldown. You get a point to your ult whenever you can, because its your ult, man.

Flash and Exhaust is my personal favourite at the moment. Its easily the best for 1v1s.

Flash and Ignite is good too for a lane you're going to be aggressive. But don't play with fire too much, cuz you might get burned (get it?).

Pros:
Shield OP early
Beast late game
Mobile
Great damage output
Passive doubles you're crit chance
Those Abs
Cons:
Not immune to CC
Weaker early game
Your crits are 10% weaker