3 things I learned from playing poker
1. Confidence is key
If you are confident, you will win. If you are not confident, you will lose.
2. Know your opponent
If you can figure out what your opponent wants and how he thinks then you can beat him.
3. Don't get too attached to any one hand.
The more attached to a hand you are, the more likely it is that someone else has a better hand than yours.