PSA: Assume your opponent is good

I never do stuff like this, but it needs to be said. It is more fun to pick well and therefore have a better chance doing well then do "whatever." Assume the other team is safe picking and counter picking while keeping their comp in mind. And once in the game, they aren't playing randomly; they have goals in mind (like killing you) and use strategy (baiting, attrition, forcing trades, etc) to accomplish it.

tl;dr best advice ever