Secrets of Texas Hold Em
First if you are tired, angry, drunk or your condition is something other than focused, sharp mind, DON'T play! You will loose money in time. Texas Hold 'Em poker game requires patience, sharp mind and focused eyes.
Now, keep in mind that every table has one or two very skilled players. You must pay attention to those players so find them. If you are a beginner in poker game do not look for a table of few players. You chances to win decreases and further more you are paying more blinds. Take a table like 10 seats for examble. I prefer 10 seat 0.5/1 or 0.25/0.50 no limit tables.
When playing at a table do not start aggressively. Just look around and watch your poker game buddies. Learn how they play and mark those players who are playing well, you will notice them in time. A good player does not play all the deals, in fact he/she folds about 90% of his/her cards and plays only with good hole cards. Focus on them and avoid playing against them unless you have a very good hand. You could use holdem odd calculator program like HoldemSpy if you are a learning to play. It calculates the odds having a good hand on river and suggests if you should bet, call, check or fold. You should not follow its suggestions blindly, use your own common sense but it gives you good guide anyway.
Now you are playing full. Look at players who play every deal and those players you think they bluff. But remember, play only with good hands. After you have learned to play well you can start learning to bluff time to time but bluffing is another story to tell so I'm not talking about it now because it requires skills also.
Good hole cards are starting from 8 or better. Fold everything else even if they suit. It is just not worth playing those cards. Exception: you have A and something else (under 8), then check or call but if you have K and the other card is below 8 then throw them away always. Not worth playing. If you have AA, AK or KK then always raise right at the beginning but keep in mind that you do not bet too small, the idea is to go on playing against one or two players. This way you have much better chance to beat your opponents.
As a conclusion of all this, reserve a of time for yourself, maybe several hours. You can not win big money in short time. Be patient. Fold bad cards EVERY time, don't rely on them ever. Make notes of other players: how they play? Who is good, which are bad and so on. Avoid playing against good players. Finally, remember quit playing when you are winning money. Do not continue playing and thinking you could win a bit more...