I don't dust that often even though I should. Having two cats and two dogs means a ton of hair all over the place. It got pretty bad so I actually dusted everything. A few hours later it was covered again, though.
I do like a clean house though. Once in a while I will get some disinfectant spray and a cloth rag and clean everything in sight. I guess I do a good job because guests always tell me how nice and clean my place always is.
Pretty rarely. Generally, about once a month, I'll decide to clean my house. That's when I actually clean stuff, but I don't make an attempt to dust things. 😛
Once a week at most. It tends to get dusty a lot on shelves and cabinets, so it's best to clean them up (especially if there are electronic devices nearby).
I even keep some stuff I collect on shelves with like shelves above em. Less dusting! XD Of course some things like my Lego Elves would be awful to dust which is why I do it. XD And who wants dust on figures and brushable My Little Pony's?!
I keep my computer (s) really dust clean, hat seeing the screen full of finger marks and dust of death. other then that My bedroom is an dust heaven, and you don't want to look under the bed