Fool me once, etc. I cannot believe how long it took for me to truly learn this into action. I accept apologies, and I forgive. I now know, that doesn't mean I need to sit close enough to the flame to ever get burned again.
One of the keys to success is passion. If you care about something or want it naturally you won't need to force yourself to work on it. The passion will be your fuel. Only work on things you are passionate about.