What is the best advice you received that you would like to share with aspiring designers?

When I was moving to Hong Kong and was about to make a lot of money Tibor Kalman told me: And dont you go and spend the money they pay you or you're going to be the whore of the ad agencies for the rest of your life. I didn't and got easily out of it again. Most of my collegues did not get that great advice and are still stuck in the agencies.