Invest in What You Know. - Peter Lynch

Peter Lynch doesn’t advise you to buy stock in your favorite store just because you like shopping in the store, nor should you buy stock in a manufacturer because it makes your favorite product or a restaurant because you like the food. Liking a store, a product, or a restaurant is a good reason to get interested in a company and put it on your research list, but it’s not enough of a reason to own the stock! Never invest in any company before you’ve done the homework on the company’s earnings prospects, financial condition, competitive position, plans for expansion, and so forth.

In dieting and in stocks, it is the gut and not the head that determines the results.

You have to keep your priorities straight, if you plan to do well in stocks.