You could try with great rigor a lint roller and go through many sheets. Perhaps follow that through with a washing in the washing machine? If kitty sheds alot you may also consider regular brushing, I use Furminator and it does great. It doesn't cut my cat's fur, reduces the hairballs, and there has been less shedding in the house.
I'm afraid it's impossible. I have three different homes at the moment: university, my parents house, and the boyfriends. The cats are at the boyfriends. I then go to my parents and wash my clothes. I then go back to university and find clothes that have never been near the cats covered in hair. Cat hair gets everywhere.
I keep my nice clothes and fleece-y-ish outer-wear away from cat-access in a closet iwth pain-of-death (or lots of hysterical screaming) as the punishment for leaving the closet door open. I only dress in those clothes *minutes* before I leave the home. When I return, those clothes are imediately placed back in the closet and away from the kitties. When they require washing, I wash/dry them separately from other every-day clothes.
Sticky-tape and diligence in keeping the cat-hair-magnet clothes away from cat hair. Good luck. It is a never-ending battle.