Don't be afraid to check the flop after raising preflop. Sometimes its just the right play, even heads up. Thats probably where a lot of your chips are going.

C-betting is an overrated play and is very easy to overuse. Just do it enough to instill doubt in your opponents (e.g. to have a flop agg of at least 35-40%). If you don't think they are folding 50% of the time, then don't even bet.