I use whatever is handy... hand towels, t-shirts, shirts, underwear, socks, sheets... sometimes let it dry on me, other times squirt it into my bedsheets and sleep in it. For some reason though I never mop it up with jeans. The best is to use some other guy's clothes to wipe up cum (usually his, cuz mine is somewhere inside him by that point). Heh heh. It keeps him there for another round while the laundry is being done.
I had an exhibitionist friend (huge dick, too!!!) whose bedroom had no curtains or blinds on the windows, and he'd Jerk off at the window for all to see and blow his loads onto the glass and let the cum dry there... never cleaned them either, so his windows (and mirrors) were a testament to his output. It was fucking hot!