Xin Zhao Build
Not Updated For Current Season
This build focus's on his attack speed and abuses it with the high increase in speed.
You will want to start the game with vampiric scepter and turn it into Stark's fervor
Then build your boots and phantom dancer. Your increased movement speed will allow you to chase down kills better as well to farm more then one lane as you run between them looking for ganks.
Late game you will have enough lifesteal to be sneaking into the jungle during team fight to heal back up off of a monster as well to keep you alive in teamfights.
Don't be afraid to farm the jungle mid game. Use your Q spell to increase speed of your jungling without spending too much mana.
Your main job in fights is to do damage and survive so you can chase down the enemy when they turn tail. Abuse the movement speed paired with Q Spell's Knock up to slow your enemy down to a screaching halt.