General tells

I searched this forum to no avail.

Are there any basic tells that inexperienced players make?
Ive played about 5-10 home games w/my friends and I cant seem to get a real solid grasp of why they make the plays they make.

Note: these are very bad players. Their flop call means that the two cards in their hand may or may not have anything to do with the board.

The only thing I may have picked up on is when someone is ready to fold their cards, they usually have their hand on them. Are there any other tells, like how they put their chips in the pot, that I should be paying attention to?

Thanks in advance for the help.