You should strive for a flop percentage of 10-15% in the early to mid stages and 15-20% in the medium to late stages. In tournaments, you should consider your position, the peculiarities of your table, and your cards while calling the flop. If you have nothing better to do than worry about how much the other players are betting, then you're in the wrong game. The primary goal is to get things over to the turn and back again. You can only call so many times with bad hands before people will think you're trying to steal their money. The more often you flop strong pairs or straights, the more likely it is that at least one of those players will check behind. When the turn comes, go ahead and bet again if you've got good cards. And once the river arrives, put more money into the pot if you need to continue improving your hand. This is not a game where you want to be tight with your chips. It's very important to keep tabs on your stack throughout the hand so you don't find yourself with no choice but to put all your chips in the middle of the table. And even if you do have enough money left after the last bet to stay in the hand until the end, it's still a good idea to avoid putting all your chips in front of you. That's called blading and it's not recommended for new players.