If you haven't written an executive biography and a few bullet points outlining your proudest accomplishments, you should go put them together now while it's not urgent.  In the course of your life there will most likely be several occasions where you'll need them (for Web sites, press references, interviews, speaking engagements, and showing to Mom), and it's generally best to do them ahead of time while you can spend some time thinking about what you'd like them to say about you.  Shelve the urge to be modest for a few minutes and work on your personal elevator pitch.

And, as I'm sometimes reminded, keeping your bio and bullet points up-to-date is one of those things like packing for a trip that's really easy to ignore and put off until it's urgent.  But it's not a good idea or you'll end up doing them at the last minute like I always seem to do.  And unless you have your own publicist it probably falls on you to update your executive bio--and it's not the kind of thing that's good to rush.  So take a bit of advice from someone who recently had to update his under a five-minute deadline and go update yours when you get a free moment :)