Espresso 
The Sexbyfood blog about innovation, simplicity, integrity and tenacity.
Tenacity
Via 37Signals:
How's this for tenacity? John Dane is 58 years old and has been trying out for the Olympic sailing team for 40 years. He finally made it this year with his son-in-law, Austin Sperry.
Dane missed qualifying for the Olympics 4 separate times, each by a few minutes. He didn't give up after each loss, he just improved his sailing skills.
At first, this kind of story sounds like a long hard slog. But the thing is, the more you enjoy what you do, the more it gets easier and easier to be tenacious. I've sailed for a couple years of my life and my cousin is a successful sailor on the international circuit. From how I feel about the sport, I'm sure John Dane would have carried on sailing anyway, regardless of qualifying for the Olympics. Once a sailor, always a sailor.
Seek enjoyment in whatever it is that you do.
Where there is no doubt, the wind is your companion.