Increase your vacuuming frequency and get a robo-vac for daily cleanup of drifting fur if possible. A good attachment for cleaning furniture really becomes the biggest factor when buying a new one. Also you’ll want those tape rollers (buy the multi-pack from Costco) to de-fur your clothes before going out alongside pretty much abandoning black clothing. A lily brush is great for collecting fur from the fabrics that really hang on to it.

If they’ll tolerate it, brushing the cats more frequently also is great for reducing how much floats free.