First, take your schooling seriously especially in college. Make sure the course you are taking up will lead you to the job you always wanted. If not, then, reassess yourself. Ask yourself what you wanted to become. Once you find the answers, look for ways to attain them. And if ever you stumble on the way, stand up, learn your lesson, move on and keep going.
Apart from all that I've said, the most important is to be grateful for everything and to appreciate the people who are always there for you.