Sleep. What a concept. As an entrepreneur it's more rare than cash, and harder to come by. As Mark Suster wrote in his recent blog post about Entrepreneurshit "It’s 4.50am. Sunday morning. And I couldn’t sleep. I have much on my mind since I just returned from a week on the road. 5 days. 3 cities." Most nights I lie awake for 2-3 hours in the night. The gerbils running on the treadmills in my mind never stop. Problems. Opportunities. Equations. Spreadsheets. People. Endlessly running. Until recently I worried about [...]