Lifehacker has a good list of ten ways of tidying those errant cables. The bulldog clip as a cable organiser is the most snappy (sorry) idea.
Tidy those cables
These velcro re-useable cable ties are good, but a little pricey (Amazon UK), for a huge list of cable harnessing and organising widgetry, try StudioSpares (UK).
Nobody said every post has to be exciting, did they?