I have 1 for phone messages, 1 with my "weekly to do" list, 1 with my "need to do as I have time" list, and a "personal to do and projects" list (because if I don't write it down when I think of it - it won’t get done!) It drives me nuts but I need them all. I've tried a 3-5 subject spiral notebook but hated that once that page is torn out it's not going back in and one section inevitably fills up before the others and you're still stuck with multiple notebooks. Then I found www.levenger.com and their "Circa" notebooks - they are the bee's knees! It's like they took all the great aspects of the padfolio, binder, day planner, and spiral and merged them into a neat little contraption.
It's got a sturdy cover with pockets inside for business cards, loose paper and pens like a padfolio, is bound like a spiral so it's easy to write in (especially for a lefty!), but is refillable like a binder! You can order different kinds of paper (I have the to-do list paper, and the annotation ruled paper), dividers (to keep my lists separate), and it comes in fun colors!! So while I have just proven how extremely dorky I am, I have done so in hopes that if there other list-making, note-taking freaks like me, I have just made their life a bit easier!