Here's my progress on 12 Days of Christmas by Teresa Wentzler. Days 1-3 are complete.
Here is how I store my WIPs when they are waiting to be worked on. As you can see, each one has the appropriate flosses kept with it. The patterns are kept in a 3-ring binder. I laminate the floss keys and 3-hole punch them so that they stay in good condition and fit in the binder.