Management really isn't that difficult. Its just unfamiliar because we've been told what to do for a really really long time, and finally having to tell yourself to tell somebody else what to do might seem strange. Its all in thinking outside of your head and paying attention to what is going on, and seeing things from other's perspectives.
The 10 rules at the bottom are the characteristics of good managers, startup or not. Unfortunately, most managers fall victim to a few of these, especially #2 (Never waste time justifying past decisions or trying to rescue failures) and #10 (Be honest). It's amazing how often bad managers fail at both at the same time.