Often, I have to raise 4-5 times the Big Blind in order to thin the field pre-flop. But when I do this, I am sometimes put in a position of risking a significant number of chips when I continuation bet on the flop, and then, if warranted, on the turn. Consequently, I am sometimes virtually pot committed and can't get away from hands I feel are losers, such as top pair, when I get re-raised. Is it wise to reduce the c-bet amount to 1/4 to 1/3 of the pot size as a default strategy rather than 1/2 to 3/4? Thank you.