It's always too early to quit.
Expect problems and eat them for breakfast.
To be a good loser is to learn how to win.
Who seeks shall find.
If you're going through hell, keep going.
Know or listen to those who know.
You never know what motivates you.
If you think you can do it, you can.
Be kind whenever possible. It is always possible.
By failing to prepare, you are preparing to fail.
Throw in the humor, throw in that personality, try things you wouldn't normally try.