When most people bluff, they will try to make their body language suggest they have a stonger hand than they actually do. They might announce their bet with more authority than normal, and try to give the impression they are extremely confident with their hand.

So, if you are playing against people who are watching for bluffs, resist the temptation to suddenly act confident; try to behave the same in every had you play and people will find it harder to spot your bluffs.

Targetting your bluffs against players who easily fold is also a good strategy. Usually they will fold and you will win the pot. There is no real value in bluffing against players who call too often.