I've been in the trading world for a year, and the two most important things I've learned:
1. Patience is the key to survival. Not every market movement is an opportunity, and most gains come to those who have a long breath.
2. Trade with money you don't need. Because when you enter the market under pressure, your decisions will be emotional and reckless, and at that point, losses are not far away.
Trading is not an easy game, but over time, you learn to look at the market with a different perspective.