Well, hell, since the thread got bumped and I haven't seen it mentioned: Velcro ties and/or velcro straps and/or velcro cinch straps. They come in varying widths and lengths, but like zip ties you can always connect one strap to another to make a longer one. Or buy a continuous roll and use it like tape. Surprisingly strong, UV and twist tortioning resistant. Unlike zip ties, they're reusable (well, zip ties can kinda be reused if you can release the lock tab). Because of that you can wrap them around bits of framework on the bike -- handle bars, forks, swing arm, frame, mirror stalks, cables and wiring. I actually have one wrapped around a Givi baseplate for the past 5 months because I keep forgetting to take it off. Having them on the bike means you don't need them in your toolkit or storage. Reusability also makes them toolless for removal. They are, however, wider than zip ties and a good, thick set of zip ties can probably hold more weight than the velcro straps. Zip ties are also a boon if you really need to apply a lot of pressure to strap something down. The width does help, though, as I used several straps wound around the joint of a bar end mirror to keep it from folding in. I carry a few wrapped around my everyday toolkit pouches that are stored 24/7 in the bikes. I have a supplimental repair kit that I carry whenever I'm going a distance which has more, along with some strapped around cable bundles or the like in lieu of zip ties that I could repurpose in a pinch. I still carry zip ties but 50 velcro straps pack smaller than 50 same-length zip ties.