There are many solutions for cable management, but how about letting your cables solve their own freakin' problems? If you've got an old coiled phone cord, it can do just that.
Thanks to mobile phones, you don't see as many landline phones in homes these days. But back in a simpler time we used to have all kinds of corded phones - especially those of the coiled variety. Home and technology blog Unplggd suggests dusting off your coiled phone cables and using them to wrap up stray cables around your home. It's a lot like this paid solution, only it doesn't cost you anything.