Life is full of misery, loneliness, and suffering - and it's all over much too soon.
Hard work is the key to success, so work diligently on any project you undertake. If you truly want to be successful, be prepared to give up your leisure time and work past 5 PM and on weekends. Also, have faith in yourself. If you come up with a new idea that you believe in, don't allow other people to discourage you from pursuing it.