The single biggest leak micro-stakes players have is not knowing how to fold post-flop. If you can learn to fold, even if it's the best hand sometimes, you win. You don't have to play so weak-tight every time, but if you can't figure out what the most +EV play is (bet/raise/call/fold) then folding is usually the best option. This in turn will help reduce you from tilting and making further bad decisions.