Many experts suggest a record book as a tool to improve each successive year's garden. I combine my record book with seed storage. Because I have small plots, I always have leftover seed that needs rotating every year. I do this with index cards and an inexpensive plastic photo album.
Supplies for organizing seeds in a log book
Index cards, a photo album, a calendar, and if needed, small ziptop bags for seeds, and appropriate writing utensils are handy household staples to use for organizing garden seeds.
Store each seed packet with its index card.
Keep a seed envelope in one pocket of a photo album. In case there is leftover seed, tape the envelope shut or place in a small ziptop bag that has been labeled with a permanent marker. Mark an accompanying index card with the crop name, year, and make notes throughout the growing season.
A list of seed "lifetimes" can be handy
For multi-year seed albums, a note about seed lifetimes can be handy. Making a coordinating note at the bottom of any particular seed's index card like "buy new seed in 2014" can serve as a handy reminder during the winter months of planning.
Use the seed album by keeping it handy
Seed albums and other records are good only if they get used. I store my album with my garden gloves. When it is convenient and seen frequently, I use it for making notes all season long. If it's inconvenient and I don't see it, I forget that I have it.