In the past, I have tended to use an Amazon.com wish list as well as blog posts to track books of interest relating to digitization and copyright. Earlier this year, I converted those into an Amazon Listmania list and then added other related books from Amazon. A few people have stumbled across the list and perhaps have found it useful. If you're curious about what's on it, check it out.
For me, this is truly a list to use to jog my memory. Yeah...I saw a copyright book that would be useful...what was it again? If you'd like to create a list to jog your memory, you can do it in Amazon (or another online bookseller), LibraryThing or on other web sites. (And having it online really is more useful than in a document on your computer.) The trick is to find a place that you'll remember and that will have or allow you to enter information that you know will be useful. Not only is that list then available for you, but you can also share it with others. And perhaps, if funding is available, it could be the list you use to updated your institution's collection.
FTC Disclaimer: Digitization 101 is an Amazon affiliate and may receive a small commission if you purchase a product or service from an Digitization 101 Amazon link. (Trust me, I'm not getting rich off of Amazon.)