Here's a good website I ran across while reading The Independent tonight. 21st Century Boy
The author of the site realized he didn't know how to change a tire, tie a tie, or shave properly, and figured other young men didn't know how to either. He was right, and he now has a very successful website with what I think are some useful tips . Besides the ones mentioned above there's one telling how to hold a baby and another about how to check for testicular cancer.
Anyway, I emailed this one to my son because I'm pretty sure he doesn't know how to do any of this stuff either.