Brushing the cats regularly is the first step - this removes loose fur that will otherwise fall out on other surfaces. Most cats love being brushed, and id say doing it a every week at a minimum will help.

Other than brushing, having the right type of vacuum can make a big difference.

Are you in the southern hemisphere? Our cats she’s a lot more in the summer vs winter. Spring is especially bad, as they are getting rid of their winter coat.