One of the most important aspects of Texas hold 'em strategy is the selection of which starting hands to play, and which to fold immediately. The following is a table of the probability of a given starting hand to win or tie, win, and tie, given a 10-player game, which is the most popular number of players at most online casino sites.
High Pairs: Pairs from Aces to Tens are always a good starting hand, you have the chance to improve on them, and even if the board doesn't help, you can still win with the highest pair.
Middle pairs: They have very little strength, and cannot usually win without improvement. If it is not expensive, wait to see the flop and what possible drawing possibilities are there. If opponents are betting aggressively then fold. Possibilities are straight and flush draws.
High Cards: Two unsuited high cards should usually be played at least to the flop. The chances are that if you flop a pair you will have the best pair on the table. Suited high cards should be played more often, as a high card flush is now possible.
Suited: If your two cards are suited, don't overrate them. A Nine hearts, with a Eight hearts, is open ended and slightly better than Ten hearts with Seven hearts, as the gap reduces your chances of hitting the straight. In a strong pot fold. Ace or King suited with a small card, should be treated cautiously in the same way as gap straights. Ace with 2, 3, 4,or 5 is better as the possible low straight still exists.
Bet or call most of your drawing hands, if you have a four card flush or four card straight. Everyone may fold, or you may hit it.
If you don't have a drawing hand after the flop fold.
If the flop goes against your high pairs, and shows possible flush or straight, fold, especially if there is heavy betting.
When you hit a flush or straight, be aware of the possibilities of other players having the same hand but higher. If there is heavy betting, it is probable that someone else has hit it as well.
If you have 2 pair, or 3 of a kind, and after the flop, and there a two suited cards in the flop, bet to knock a player off a flush draw, the same is true for connector cards (possibly making a straight) the goal being to keep players from seeing cards that may help them and not you.