For example, if low self-confidence is your problem then quotes on procrastination wouldn't help at that particular point in time.
The following is a quote that I'd like to remember when I'm feeling nervous or unconfident:
Our doubts are traitors and make us lose the good we oft might win by fearing to attempt.I hope I never forget this. I have a tendency to be worried and nervous and self-sabotaging. I hope remembering this helps me to trust in myself. :)