This may sound odd, but I've found myself buying books, watching sermons, conferences, having discussions etc. and thinking from time to time I'd love to do a study on "x" or this books on sale now, so I'm going to buy it, but won't be able to read it until later...
In most of these situations, I find that I forget what I originally wanted to study, or may start the study but forget where I left off, etc. Tonight I explored the possibility of using the prayer lists as a way to created a checklist of books to read or studies to start, using the notes section in the prayers I could list resources to look at, or methods to use while researching, etc.
Anyone with a similar personality know of a better method?