1. Think long-term. The longer you hold the more money that you make. Money is made in the holding. Not the buying and the selling. Warren Buffett said it best, " if you can't hold a stock for 10 years, then don't bother holding it for 10 minutes." 

2. Patience is the most valuable skill above all. It's easy to get rich if you are willing to hold for 10 years. If you don't have patience you cannot succeed as an investor.

3.  Trades are always measured in years. Never in months weeks or days. Short-term planning is planning to fail.

4.  Crashes are a normal part of the investment cycle. They cannot be avoided. Crashes are inevitable and they are supposed to happen. Just like winter and summer. The market also goes through crashes and Booms. You must get used to it because it's normal.