Beating Greed
I'm sure everyone has lost to an opponent who played very materialisticly (is that a word?!). Often, they take pawns that your instinct tells you had no business being taken... and yet you are unable to exploit it and so end up losing.
As annoying as that is, playing against materialists can also lead to some beautiful chess.
Bon Appetite! :P.
"The ability to work hard for days on end without losing focus is a talent. The ability to keep absorbing new information after many hours of study is a talent." - Garry Kasparov