There are basically two types of people. People who accomplish things, and people who claim to have accomplished things. The first group is less crowded.
I've learned that you can tell a lot about a person by the way (s)he handles these three things: a rainy day, lost luggage, and tangled Christmas tree lights.
Do what you love to do and give it your very best. Whether it's business or baseball, or the theater, or any field. If you don't love what you're doing and you can't give it your best, get out of it. Life is too short. You'll be an old man before you know it.