I attach a strip using 1" wide fabric about 12" long, turning 1/4 on each edge lengthwise then folding over and stitching (literally folding 1" binding and sewing length wise, make it about 8-10" long sew a lobster catch on one end, catch the other end in a seam, and I can use the catch to hook my keys on, just grab the fabric and it pulls my keys to the top of my bag. This also stops them falling out anywhere.