As we all know Poker can bring in a lot of money, but it can cost you some as well.
Sure the game its self depends on the luck, but there is a even bigger secret to it.
It's called bluffing.

A good bluffer can win a hand, even by having the worst hand of all.
The point is to make your opponents think you have better cards than they do. If you succeed, they are bound to throw in the cards.

Pure cash;)

NOTE: EVEN TOUGH THIS IS QUITE EFFECTIVE, YOUR OPPONENTS AREN'T STUPID. THEY WILL FIGURE YOU OUT. ALSO THE TECHNIQUE IS PROVED TO WORK, BUT IT WON'T GUARANTEE YOU A WIN.
So play for fun and only with the money you are willing to spend.

Good luck.