3. Reduce Portfolio Turnover

Rapidly trading in and out of stocks can potentially make an individual a lot of money, but according to Buffett this trader is actually hampering his or her investment returns. That's because portfolio turnover increases the amount of taxes that must be paid on capital gains and boosts the total amount of commission dollars that must be paid in a given year.

The "Oracle" contends that what makes sense in business also makes sense in stocks: An investor should ordinarily hold a small piece of an outstanding business with the same tenacity that an owner would exhibit if he owned all of that business.

Investors must think long term. By having that mindset, they can avoid paying huge commission fees and lofty short-term capital gains taxes. They'll also be more apt to ride out any short-term fluctuations in the business, and to ultimately reap the rewards of increased earnings and/or dividends over time.