
Poker played well is not gambling, but a game of skill, psychology and knowledge. While there is a significant luck factor in the game, this will even itself out over time, so good players will be winners and bad players will be losers in the long run.
Always bear in mind the following tips for good and consistent play:
Check our starting hands ranking if you are not sure when to hold'em and when to fold'em.
Take your time to learn and be very cautious when playing higher stakes. Never play with money you can not afford to lose. Don't think you'll beat the pro's when you won a few hands on microlimits.
This is a common mistake. Even if you flop a great hand like a straight or a flush, keep paying attention to the next cards. Notice when other players get (better) straight or flush possibilities.
Bluffing against a calling-station is obviously a bad idea. This type of player will call you anyway, and you'll end up losing lots of money.
You will start playing too many hands, too loose while not paying attention to the game.