some people never learn the lesson

Think about this!

What lesson do you wish you had learned before you learned it?
When did you learn this lesson?
When would you have like to have learned it?

How did you learn this lesson?
How would you have liked to have learned it?

Of you had learned this lesson when and the way you would have liked to have learned it, how might your life have been different?

Do not repeat past mistakes.
Do not accept salesmen decision! they want to sell their products.
Think before making decision.
Make decision that you can execute.
If some one was given opportunities repeatedly but never produce satisfactory results, do not trust him anymore, how hard he convince. May be the idea is good but let some one do it (better the young one-if they made a mistakes there is room for correction!)