Black hair elastics. I double-looped one around my gorillapod and put a cheap carabiner on it. Now when I head out with the little camera, I can clip the little tripod on my bag, or the diaper bag, or even a belt loop if I really want to look crazy. They also can be looped or threaded around straps in various fashions to keep them from flopping around. I saw that somebody was using them to fix a light leak at a lens mount on some other camera recently (not Canon).
Canon 6d, t1i, 20/2.8, 28/1.8, 40/2.8, 50/1.8II, 100/2.8 macro, 70-300/4-5.6, g1x, 430exII, 90ex
Elan 7N with 28-105/3.5-4.5II, Rebel G with 35-70/3.5-4.5, A-1 with 28/2.8, 50/1.8, and 135/3.5