Tend to your personal relationships like a garden, especially when you're younger since it becomes much more difficult to establish meaningful relationships the older you get. It's only my experience, but that is my greatest regret. I think the less important things like career are more easily tackled with a solid foundation of personal relationships.

Also, I've found striving for perfection is fool's gold. Yeah, you may be "that person" that friends/family/colleagues will love name-dropping you every chance they get. The others will probably care little that you're an expert and may even resent you for it.