Here's a particular false tell that I've used successfully both in tournaments and cash. However, it has to be in the right situation against the right player and can only be used once against any particular villain.
Situation, playing against an aggressive player with a made hand. I.e, flopping a set. Here you check call on the flop. You can make a moderate bet on the turn or check call. Now the river. You eye your chips and start handling them as though you're trying to decide how much to bet, then you quickly decide to check and tap the table and perhaps sheepish smile like "I can't put out more money on this". Once you touch your chips and then decide to check, the aggressive player will go after you.
I did this with trips knowing this aggro guy was trying to buy the pot. As soon as I decided to check he put me all in. I instacalled saying "I call, what do you have?" He wasn't going to show until I insisted that I paid to see his cards. Pure bluff. As I scooped up all his money his buddy was saying "Why would do that?" and he replied "I thought for sure she didn't have anything".