Just a few I have wrote down to help me when in need:
1)Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
2)Learn from the past, set vivid, detailed goals for the future, and live in the only moment of time over which you have any control: now.
3)Even if you fall on your face, you're still moving forward.
4)What you do today can improve all your tomorrows.
5)There is nothing deep down inside us except what we have put there ourselves.
The last one makes me lol, I don't think its very inspirational or motivating but I always think 'yeah I put food in there' ha ha x x x