The Dis design boards are great for autograph book ideas and will inspire you to make your own -- There are reall some great ideas there. I am not so talented as those disers, so I have used the clip art sites in the sticky there and have created albumns with clip art. Just a picture in the corner with plenty of room for a signature. They are about 5x7 and printed on card stock. I will take them to a printer to be spiral bound (about $5). If you do this, don't forget blank pages too.
There are also some character lists that are very helpful to go by...otherwise you could end up with pages for characters that you are unlikely to see. However, if you go to
MNSSHP, you probably will be able to obtain autographs from characters that aren't usually out the rest of the year. I found a site wdwautographs (sorry, I am too new to post link) that has a comprehensive list of characters and also states when/where they saw the character and how frequently they are seen. Also, the site disneyautographbooks has a very nice selection of autograph books -- I haven't ordered from there, but would if I wasn't making my own.
Have fun..you have a lot of time to enjoy planning!