When you make a mistake, don't look back at it long. Take the reason of the thing into your mind and then look forward. Mistakes are lessons of wisdom. The past cannot be changed. The future is yet in your power.
That's right. What am I thinking? I'm used to sailing down under with the kiwis so everything's backwards and the toilets when you flush them, the water spins the opposite way. Really freaks you out the first time you see it.
You must give some time to your fellow men. Even if it's a little thing, do something for others - something for which you get no pay but the privilege of doing it.