Only trade in options with high volume so you do not lose a large amount percentage of money on the bid / ask spread when entering and exiting trades. (newtraderu.com)
Any method that comes out with a result that indicates you should invest a large percentage of money in a small asset class or small stock should be questioned. (alephblog.com)
Essentially, when you put money into your gas tank, your credit card company gives you a certain percentage of that money back. (creditdonkey.com)