Ever since someone here mentioned they kept a record of the books they read (I think it was ecb??), I thought, that is a useful idea. So I have several years' worth of lists. I have only been recording books I actually finish completely, and most of them are novels (ie I don't record the picture books because some of them I read over and over and over to my kids). Since I try to say positive things in public, I like having the list because I can be a little more complete about my reactions in private--things that worked, and things that didn't for me, so I can avoid that in my own writing. Sometimes at the end of the year, though, I'll post a list of all the titles, or titles by genre, on my blog, just to see them all together.