Dust is everywhere & if you don’t tend to it, it accumulates fast.  Years ago the best way was to vacuum as much as you could, which is still a good way to tend to dust in large areas.  Smaller areas have changed over time w/ technology.  Old way was to use a dust rag & occasionally spray it w/ “endust”.  Now there are products on the market that make dusting a lot easier.  I’ve used Swiffer Duster for a few years & they’re great.  They pick up a lot of dust plus get in tight or narrow places.

Changing your furnace filter every month is helpful.