It used to be time management. For the first 10+ years of my career I worked all the time and it wasn't very healthy. I was trying to do too much and didn't understand how to delegate. I have been fortunate to team up with a lot of talented people in the last 5 years and have learned how to collaborate and delegate much better. So now I feel totally in control of my days and my time.

Maybe now quality control is the hardest. How do we ensure everything we do (programs, events, content) is world class? We'll never quite get there but that is the goal.