And never wear a red shirt
I wouldn't volunteer for an away mission either. From OPEN Forum.
Hire people who are smarter than you. Kirk had Spock. Janeway had Tuvok. Picard had Data. Starfleet captains are highly intelligent, highly trained specialists, but every single one has a close and trusted officer on board they know is even smarter and more capable. When a captain runs into a situation that's beyond his mental abilities, somebody with the capacity to figure it out is right there on the bridge.
Takeaway: It's tough on the ego to not be the smartest person in the room, but great for business. Hire people specifically because they're smarter and more capable than you are. It will give you a huge advantage over leaders whose egos can't take the hit.