Two suggestions for c-betting:
1) In absence of a genuine read, if you have the urge to c-bet, determine a % you want to do it and use your watch to randomize the occurence. Dan Harrington suggests this in his book. Say you want to C-bet half the time: when the second hand is between 0-30 = bet, when it is b/n 31-60 = no bet.
2) Change gears with c-bets. I c-bet a lot more when I get to the table to setup a loose image. Given the right table I get away with this for 10 orbits or so. When people start calling more or check-raising me I change gears. Changing gears doesn't apply to tables without astute opponents.

Two other givens when C-betting:
I c-bet quite a bit less OOP, obviously.
Don't C-bet into more than 2 opponents.