Been said before but table selection is key i think, theres a good free program called TableScanner Turbo that i use and find really helpful.
Think about it like this though, what kind of board textures do you cbet your trash with, hoping to take it down on the flop? Paired boards, Dry boards with one face card, Single suited boards etc
If you have AK IP and the flop comes down K22 just check it back, make all the pp's think their good, or make the QJ's AT+'s think their good when they hit on the turn, because you'd be cbetting on this board with all your air in the hope to take it down, and you do this b/c most of the time you do take it down!! So if you go betting this with your AK then you'll just take it down because this is a perfect board to cbet with air.
Hope i worded that well enough, just think in opposites to what you'd do with air i guess.