How do you cope with dust build up ?

Over the years I am constantly battling dust build up. Although I dust with feather duster, there are places that you cannot get to unless you disconnect equipment and or move equipment ( in my case very difficult to do).
I'm pretty sure that the dust build-up is a major problem with equipment. It gets into the cases, on the drivers, on the connections.. pretty much everywhere.
What do most of you do about this?
My LP collection suffers same fate and it's in a cabinet..
Not a sealed cabinet however. Yes the Lp's are in sealed covers( mostly) but dust builds up on covers etc.
Any suggestions?
I always thought it would be a good idea to clean the inside of my Rotel RMB-1095 amp. I'm sure there's some dust buildup inside.

But then I'd have to pull it out of the rack. 88 lbs. Anyone want to help? I've ordered myself to avoid heavy lifting forever.

The latest (5/2005) Consumer Reports indicates that many ionic air purifiers produce unacceptable amounts of ozone. The Sharper Image's product was among the purifiers deemded unacceptable.
Yep, I wish I could use an ionic purifier, but you guys running two in small rooms are very likely damaging your lungs in the process. 

It’s common knowledge in the past decade that they produce ozone which is a lung irritant among other things. 
+1 “Swifters” !!!!!!!!!

Swifters can be slipped in those tight spaces between the top and bottom of your components and the equipment rack shelves; and will “grab” a very good percentage of the dust, and not just move it around. In between the cable morass behind your components and even between the exposed tubes in my monoblocs (powered down, of course).  Safe to gently remove dust from speaker cones. What I do is, with my other hand I run a hand-vac and hold it close to the places that I am “Swifting” to suck up any dust that the Swifter does not grab. Works great!