My favorites are the following:
"If you are not willing to risk the unusual, you will have to settle for the ordinary." - Jim Rohn
"Your time is limited, so don't waste it living someone else's life" - Steve Jobs
"Never give up. You only get one life. Go for it!" - Richard E. Grant
“He that can have patience can have what he will.” ―Benjamin Franklin
"The secret of getting ahead is getting started." - Mark Twain
"If you want to be happy, do not dwell in the past, do not worry about the future, focus on living fully in the present." - Roy T. Bennett
"In order to succeed, your desire for success should be greater than your fear of failure." - Bill Cosby
"Formal education will make you a living, self-education will make you a fortune." - Jim Rohn