I'm also 370 days away from being 42, and look forward to...doing something geeky to mark the occasion, but am not sure what, just the fact that 42 is a Very Special Number in certain quarters of geekery makes it obvious that a geeky celebration would be The Right Thing To Do.
One of my ideas is, it would be nice to have enough money to be able to book Mitch Benn and Toby Hadoke to do some sort of combined gig for myself and some select invited friends and family. Possible, but I suspect unlikely. (Anyone know how much they charge?)
Beyond that, though, my imagination is somewhat lacking, so if anybody has any suggestions I'd love to hear them.