Slightly unrelated but Day9 also had a really good daily on what it is to dedicate yourself to something for a very long time. Great bits and pieces for any entrepreneur and worth watching if you even know anything about starcraft:
I really enjoyed watching that, though not really from the standpoint of an entrepreneur. What I really took from that video was how important a support structure is. It sounds like he wouldn't have gone as far as he did without his brother and mother being behind him 100% for years. Every time he had a failure, there were people there to help him get past it and learn from it instead of getting discouraged. He gained this support structure by being so passionate about his game that he made his mother believe in him.
http://www.youtube.com/watch?v=NJztfsXKcPQ
Edit: 0:28:45 - On strategy and execution