I have a file marked "Pre-stamped Images" where I keep them for future use. These are stamps that were either borrowed or used when a bunch of us get together to share sets around the table for just this purpose.
These birds were from several years ago, and I forgot I had them until today when I opened up the folder. I used this set originally for a beautiful card and matching bookmark for someone special. That card also featured a single bird inside that I cut out from the right side of a duplicate copy.
The chickadees are watercolored with dark and light grays, the leaves with a grayish green. I used markers for the berries and branch. The hardest part was the layering which required precise cutting and mounting. I used a combination of green embroidery floss and gold metallic twine for the bow.
Getting together with other stampers to share stamps is a great way to expand your supplies with only having to spend some ink, cardstock and time. Each of us brings white cardstock, some inks and several of our sets to share. We spread the stamps around the table, stamp 5 or 6 copies of images we don't have and save them for future use. It's also useful for sentiments to put inside future cards.
Hero Arts and SU are sure not to like this idea! (...sorry...)