Normally if you a tight/aggressive strategy you will be successful at the micros. Most players tend to be either LAG or tight passive. Against a LAG opponent, they will give you their chips if you just give them the chance, and you you will normally be able to beat these guys in 4 minutes flat. Don't open the button so much, and trap trap trap, and slowplay your big hands. Against TAP, i would open 100% of the buttons but be careful when he 3 bets because he will likely have a solid hand. If you want more imformation, go to www.tagpoker.co.uk
that's where i started to learn heads up strategy. Don't take advice that seriously because im no expert player, but i can certainly hold my own and comfortably profit at the micros.