I was talking today with my friend Aaron who is starting a great little company called Zealog. Zealog let’s you track whatever you want with your friends in fun and super cool graphs and charts. People are tracking everything…water drank (drunk? drunken?), miles ran, pounds lost, even somebody’s fights with her mother.

We got to talking about starting businesses and he reminded me of this great presentation from David Heinemeir Hansson from Startup School 08. If you’re an entrepreneur and you haven’t watched it, you must. If you have watched it before, watch it again. The lessons are timeless.

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