Starting hands

Raise with A-A, K-K and A-Ks from any position.

You should only play premium hands in early position.
Call with A-K, A-Qs, K-Qs and Q-Q, J-J, T-T and fold everything else.

You can relax you starting hand criteria a little bit in early position.
Call with, 9-9, 8-8, A-Js, A-Ts, Q-Js, A-Q, K-Q

You can play the most hands from late position.
Call with A-Xs, K-Ts, Q-Ts, J-Ts, A-J, A-T and small pairs

Other Considerations

It takes a stronger hand to call a raise than it does to make a raise. If there is a raise before it is your turn to act you should probably fold unless you have a premium hand.

Once you post your blind the money no longer belongs to you. Many players feel they must defend their blinds by calling all raises even with marginal hands. Don't waste additional money on marginal hands. Also, don't automatically call with the small blind if you have nothing. Saving a half bet will pay for your next small blind.

Deciding whether to continue playing after seeing the flop will be your second biggest decision. It can also be one of the most costly decisions if you continue after the flop with an inferior hand. It is said that the flop defines your hand. That is because after the flop your hand will be 71 percent complete. With this much of your hand complete you should have enough information to determine whether to continue. If the flop does not fit your hand by giving you top pair, or better or a straight or flush draw, then you should fold if there is a bet in front of you. If you played a small pair from late position and you do not flop a third one to make a set you should throw the pair away if there is a bet. If you are seeing the flop more than 30% of the time you are probably playing too many hands.

If you think you have the best hand after seeing the Turn card and are first to act, then go ahead and bet. Many players will attempt to check raise in this position. If the other players also check, you have lost a bet or two. In low limit games the straight forward approach is usually the best as there are plenty of players who will call you. Make them pay. Why give them a free card if you don't have to.

If another player raises on the turn and you hold only one pair you are more than likely beaten and should fold.

If you get to the Turn and you hold only two unsuited overcards (two cards higher that any cards on the board) with no flush or straight draw, then you should fold if there is a bet in front of you. Too much money is lost by players who hope to catch a miracle card on the river. The best hand you can make with two unsuited overcards is a pair which will probably lose anyways.

If you have been playing properly you will not see the river card unless you have a strong hand that is a favorite to win or you have a draw to a winning hand. Once the river card is turned over, you know exactly what you have. If you were drawing to a hand you know whether you were successful or not. If you do not make your hand you should fold.

As with the Turn you should bet your hand if you are first to act. If you bet and the other player folds then they probably would have just checked if you had checked in an attempt to check raise.

When you get to the river there are two mistakes that you can make. One is to call a losing bet, which will cost you the price of a bet. The other is to fold your hand, which will cost you all the money in the pot.

Obviously folding your hand will be a far more costly mistake then merely calling a bet. If there is a slight chance you may have the winning hand you should call. I'm not advocating calling with nothing but you should call if there is a chance to win.