Depends a great deal on the opponents and the board and how things went pre-flop.
On a wet board against opponents who like to chase draws, you bet pretty high if you know they are gonna call.
Against people who call with anything, you bet.
Against people who you think have a good hand and will not fold, you bet.
Against aggressive opponents, you check and bet on the turn if it's checked to you, or you call turn and bet river, or whatever you think will make them think you have a weak hand and can be pushed out of the pot.