"I never attempt to make money on the stock market. I buy on the assumption that they could close the market the next day and not reopen it for five years." - Warren Buffett
A common investing mistake is buying every company that looks cheap. Just because a company is priced at a 50% discount to your valuation does NOT mean you should immediately buy! What should you do instead?
A health check-up inspects multiple body parts so that you can have a full understanding of how you're doing. Following the Triangulation Principle will help you do the same for your investments.