Don't Stay in a Hand Just Because You're Already In It

 Another common mistake beginners make in Texas Holdem is to think that "Well, I've already put that much in the pot, I have to stay in now." Nope. You can't win a pot just by throwing money at it. There may be cases when pot odds warrant a call, but if you're sure you're beaten, and there's no way your hand can improve to be the best hand, you should fold right away. The money you've already put in the pot isn't yours anymore, and you can't get it back just by playing a hand all the way to the end.  

Toby Bochan

Don't Bluff Just For Bluffing's Sake

 A lot of beginner's understand that bluffing is a part of poker, but not exactly how. There's is NO rule that one must bluff a certain amount or at all during a poker game, but many players don't feel like they've won unless they've tried a poker bluff. Bluffs only work in certain situations & against certain people, and if you know a player always calls to the showdown, it is literally impossible to bluff that player. It's better never to bluff than to bluff "just to bluff."
 

Toby Bochan