I find that if I blow dry my long hair over the bathtub, it will contain 99% of the hair that falls out. Then I do a quick swipe of the tub with my Dustbuster and voila! Hair-free bathroom floor.

I use those wet anti-bac wipes in the bathroom for a quick clean up, but if I put two on the floor and stand on them I can do a quick mop up, this picks up the hair too.