The Painless Way To Wash Walls | All you need is a sturdy large pad mop (this is the one that I use)and your choice of multipurpose cleaner in a spray bottle (a bottle filled with warm soapy water works too). Work top to bottom, left to right, and gently spray the wall down with your cleaner of choice. Apply some pressure and mop the wall. It seems to work best using a side to side motion then work your way down.
Make your own "Better than Swiffer" Dusters. Microfiber seems to work best, it really grabs the dust. You can usually finds sheets of it in the car cleaning section. You can also easily make swiffer mop covers too, by just measuring a rectangle about twice as long as the mop, folding over the ends to fit it and sewing them in place.