A friend showed me years ago how she uses empty tp rolls as cable wraps. I have liked them for that since, I find them easier to work with than velcro, zip-ties or twist ties.
If you don't know how to get a tp roll :-), check out pigsnfish's instructable.
Step 1: Wrap the cable
Wrapping the cables like that doesn't get them all twisted up like wrapping them around something will over time. Also, I find the result is usually neater.
Step 2: Slip over the TP roll
Of course, any good geek has more than one cable to deal with. So, for an extension of this idea, see my [TP Roll Organizer Box instructable].