Before Organizing:
Puzzle pieces were very difficult to find. My son usually made a huge mess by dumping the container over to find the right pieces. Most of the time he gave up.
How I Organized:
I took a black permanent marker and numbered all the puzzles. (on the back)
Then I labeled baggies with the same numbers. I also added the type of puzzle it is and how many pieces go to it.
After Organizing:
Now it's easy to play with the puzzles and pieces don't get lost.
P.S. We have a One Puzzle At A Time rule at our house.