As most equipment has a serial number, Boards, sails, masts even carbon booms. What I do is when I purchase a new piece of gear I break out the trusty digital camera and take a photo of the serial number etc.
I then upload this on my P.C where I have a collection. Burn a CD with the pics and leave it at work or somewhere safe.
When your bored at work you can make a collage of all your toys

If the worst occurs you have all the details.
Also good for other valuables and simplifies making an insurance claim.