Revealing Your Bet Too Early

It's a bad mistake to give away what you're going to do before it's your turn to act; poker players call this telegraphing. When it's your turn to act, take a glance over to your left to see if anyone's giving you hints on what they're going to do.

Is some one holding their cards in their hand, ready to throw them in the muck? Are they holding chips, getting ready to call? When they do, thank them kindly for filling you in (silently, of course) and plan accordingly. People who usually play online poker should keep this in mind – don't telegraph your actions and look for other people who do.