If you are a messy person, like me, try to have a clean freak in your life to keep you in line. Needn't be a partner, a friend who comes out with things like, "Actually, I find cleaning therapeutic" will do.
The kind of person who can say, "Stacker box" or "labels" without feeling sick. The kind of person who irons socks.
On the other hand, you can adopt my mum's coping system by developing a disorder called, "Hoarding by proxy."
I came up the name for this syndrome myself but I'm amazed that it hasn't been properly recognised before.
What hoarders by proxy like my mother do is they keep their own homes pin neat to Swedish Death Cleaning levels but still buy huge amounts of useless items, then offload them onto their adult children and, of course, want to see these precious things in their houses when they come to visit.
This is where the clean freak partner/friend comes in, again. You blame them for the disappearance of the job lot of bamboo picnic cutlery or American cup measures for baking, or twenty pairs of knickers in the wrong size or whatever caught her fancy at the time.
"Oh dear! I think Jim/Alice has put it somewhere!"
The beauty of this approach is that your Hoarder By Proxy (HBP) will not mind this because they think they are a Jim or an Alice.
Meanwhile Jim or Alice has taken great delight in chucking out/taking to charity shop/flogging on eBay the crap that you are too emotionally baggaged with to sort out and have left in a corner, trying to ignore.
It's not a one way street with your tidy person either. The messy are there to help them too. You are there to make sure they let their hair down occasionally and enjoy a little chaos or extravagance. A full fridge, a cupboard with lots of condiments and foreign biscuits. A make up box with exciting and unwearable eye shadows to play with. An abandoned half knitted teddy bear project for a baby who is now 17 years old. A few more cushions, pictures, toys, books around the place.
A dog or cat.
They enjoy these things when they come over to your place but they couldn't stick it in their own house. This is another syndrome called, "Relaxing by Proxy"