I have learned the most by reading biographies about successful people.
"Success Breeds Success!"
Unfortunately reading books (for fun) is contrary (time wise) to going to college. And especially contrary to one working their way through college!
So I will help you "cheat" a bit. I recall reading "Warton MBA" quite a bit along with successful people. The people themselves or those they hire or consult.
Anyway I googled "Warton MBA" and found this...
Career Advice – Ask a Wharton MBA...
Career Advice - Ask a Wharton MBA - Lei Han - San Francisco
Note: One thing I find in common with all successful people is their excellent ability to communicate. Written and oral. If they are happy, they let you know. If they are unhappy, they let you know. IF you give them a number or address over the phone, they repeat it to you so they are sure it is correct. And they repeat what you say to them to be sure they correctly understand what you are saying.
Anyway, true to the word, the above web site clearly communicates what skills are required in a nice little box at the top left of the above link.
I also found this...
MBA Pay: A Crystal Ball
Exclusive new research shows how much graduates of top business schools earn over the course of their careers...
MBA Pay: A Crystal Ball - BusinessWeek
Then from that found this...
(Bingo!)
MBA Pay Through the Years - Businessweek