If you want to learn great stock 101 advice, listen to Mr Jim Cramer, a wonderful analyst and teacher who will help any investor. One great rule that I’ve learned from him is to be able to explain my stock picks. Many might think this stock 101 rule is silly but very few realize how much this helps investors. If you tell another investor why you want to buy or sell a certain stock, you’ll find that you might not be investing on accurate information. You’ll save yourself from many mistakes.