If you are not willing to own a stock for 10 years, do not even think about owning it for 10 minutes.
Warren BuffettI never buy anything unless I can fill out on a piece of paper my reasons. I may be wrong, but I would know the answer to that ...I'm paying $32 billion today for the Coca Cola Company because... If you can't answer that question, you shouldn't buy it. If you can answer that question, and you do it a few times, you'll make a lot of money.
Warren Buffett