This sounds good - Marcus Brigstocke's new Radio 4 show, in which he gets celebrity guests to do things they have never done before, from buying porn mags and eating Findus pancakes to reading Jane Austen and listening to the Beatles.
What would yours be? Your things a lot of people seem to have done which you have not? My main ones would be:
Attended a football match
Worn a designer item
Been to the opera
Voted in X-Factor or Big Brother
Owned an iPod
Had a pet in the house