It's always too early to quit.
To be a good loser is to learn how to win.
Who seeks shall find.
Only the educated are free.
Never complain and never explain.
The most effective way to do it, is to do it.
Expect problems and eat them for breakfast.
Problems are not stop signs, they are guidelines.
After a storm comes a calm.
You never know what motivates you.
I know it sounds new age-y, but what I've truly come up with is that you really need to trust that you're on your own path, as long as you stay true to it and you show up, which is 99% of it.