It's always too early to quit.
Never complain and never explain.
What you do today can improve all your tomorrows.
The dog that trots about finds a bone.
Go for it now. The future is promised to no one.
Always desire to learn something useful.
By failing to prepare, you are preparing to fail.
Be gentle to all and stern with yourself.
If you're going through hell, keep going.
If you've got a talent, protect it.
I've been doing a lot of learning from mistakes, first and foremost, and building off that.