1. You will need to be more agile than you could ever imagine. It's amazing how much dexterity and foresight is needed to manage things when they're moving at such glacial pace, but timing is critical. An hour could mean the difference between eating next month or closing up shop.
2. Some items will succeed quickly, but only temporarily. You need to burn the kindling, but you also need some good wood. This is especially critical when you're in a service-based company. Your first few clients might bring you a lot of bacon, but the clients you build relationships buy you a pig farm.
3. You can't do it alone. Whether it's financial, technical, social, or moral support, you're going to need it eventually.
Overall, I think this list petered out a bit in the end, and some of the points missed the mark. Overall, I think that running a business is a lot like fishing, playing a game of poker, and riding a bicycle at the same time. You need patience, attentiveness, social and observational skills, and endurance.