The group of folks I work with completely humbled me by surprising me with an extremely generous gift certificate to my favorite LBS today. It was a little < $1000 and I need help with ideas on how to get the best use of the dollars.

As a reminder I'm riding a Trek Madone, triple, 9 speed. Miss Lightweight is arriving this week and will be full Dura Ace 10 speed with a 53/39 crank-plus a 50/34 FSA Carbon crank also comes with it.

I just bought a Cervelo P2k in January and it hasn't even seen the track yet.
Everyone in my family has a mountain bike.
My wife has a road bike-full Ultegra.
My son has not shown interest in road bikes, although one daughter has.
I don't need wheels...I have 2 new sets of Race X Lites, 2 sets of everyday wheels and also have Time Trial wheels.
I don't need clothing-I have way too much of that already.
Gary just bought a new/used bike so I can't help him out there....

What might you suggest? Probably something I normally would not purchase if I didn't have the gift certificate??? What is something you've bought that you might recommend??? Tools???