If you have garbage in your hand fold fast and live to play
another round.
Don't play too many hands. This is a dead giveaway that you're
a beginner and your opponents will easily figure out what type
of hands you play. Folding at the beginning when you have a
bad hand is the smarter way to do it.
One strategy in winning consistently is to find a game where
other players play worse than you. So stop trying to beat the
better players. The best way to improve your game is to practice
your skills in low-stake games.
Be sure you know the rules of the game and that you understand
the game variation you are playing.
Learn to observe your opponents, their mannerisms, their facial
expressions. At the same time avoid showing your own mannerisms
and emotion.
Watch the board instead of focusing too much on your hands.
Being aware of the board gives advanced players to see the betting
going on around them and take the advantage.
Bluffing is an effective tool in poker if you fully know how
to use it to your advantage. To bluff successfully takes a lot
of practice and requires a conscious understanding of the odds
and expectations.
Don't play if you're tired, pissed off, or having a crappy
day. Your bad mood will greatly affect your game. If you're
having a bad streak at the table, take a break to freshen up.
Keep a poker face. Your opponents are watching your every
move. Every smirk or twitch will easily give away your hands
especially if you're among expert players.
Experience is the best teacher. So play as often as possible
and continue making research to expand your poker knowledge.