Then, I just add one page per each creation. Powerpoint makes it easy to insert or delete pages. I also use it to track unique purchases like this score of polymer cabochons from eBay.
This is a page where I've recorded a project. You could use more than one page if you wanted and even get pretty elaborate with tracking your materials costs.
That way, even when you give away all your pretties as gifts, you still have a record of them. The other nice thing is that Powerpoint allows you to export to PDF so you can print the whole book and keep it in a binder. Or you can capture each page as a JPEG and upload it to a site like Shutterfly if you want something a bit fancier.