Play tight agressive poker. If you consisently come in with better starting hands than your opponents, you're going to make a lot more bets when they are calling with a second-best hand.
If you want to buy in minimum at no-limit I would suggest reading Ed Millers articles on buying in short at Card Player. I wouldn't buy in short at limit, you want to have enough money on the table to get in the maximum bets and raises when you hit a killer hand.