Worthwhile.

There are two things that I want you to make up your minds to: first, that you are going to have a good time as long as you live - I have no use for the sour-faced man - and next, that you are going to do something worthwhile, that you are going to work hard and do the things you set out to do.

- Teddy Roosevelt in a talk to schoolchildren in Oyster Bay, Christmastime 1898