Musing about tracking reading

Do you keep track of what and/or how many books you read? How long have you been doing this? What's your favorite tracking method, and why?If you don't keep track, why not?

Since I started book blogging, I do keep track of my reading religiously. Writing reviews help. I started this blog three years back but started posted reviews regularly since June '07. Before that I used to note down the books I read in a journal. No reviews but just the titles.

Now writing reviews keeps me vigilant of what I read. Book blogging is a good way of keeping track of what I read. I also write down the titles I read in a journal. No excel sheets till date!