Not exactly a reformed clutterbug but I do much, much better than I used to

It has been at least a 10 year process for us to declutter and learn to really just plain pick up after ourselves.
You'll purge as much as you can the first time around but then you'll see that you really don't need to keep this item or those things as you
walk through your home again and again. Then you'll move and see more that doesn't need to be a part of your life. It's an ever evolving,
ongoing process so don't get frustrated. The purging helps to find homes and space for those items you really need to keep around.

The easiest way I found to help with the general clutter around is to pick up after myself. So much more difficult than it sounds. Still
working on perfecting this =) Everything must have a home, a place the daily clutter belongs.
Clearing my clutter away showed how much clutter left that really belonged to my husband.
That helped because then he could clearly see what he needed to do.
He also does have a spare room specifically for his stuff in which I'll dust/vacuum a bit but don't say anything about how he keeps it.

Don't get too frustrated because I think it really is a skill, some are born to it while others such as myself need to really, really work hard just to be average