Before they were stars, many actors and musicians were just average Joe's trying to make a buck while waiting to make it big. I'm sure they hoped that many of their early efforts would fade away on crappy VCR tapes never to be seen again and eventually forgotten.
Of course, that was before the internet. Thanks to modern technology, these examples of fine acting and suave career decisions will haunt them forever. Here's two good examples for you:
John Travolta for SafeGuard Soap
Jason Alexander from Seinfeld for the McDLT