Most of this is stuff you already know...
1. Don't move furniture while wearing flip flops.
2. Get rid of everything that has any sentimental value that you really can't use anymore anyway. When you are my age (72) there is no point in looking back, as you have so little time left, looking forward is really all there is to do. And since we have no kids to pass this
crap stuff onto, what is the point of keeping it? Unfortunately my DH thinks exactly the opposite of this, and I have gone behind his back, I confess, and dumped stuff he packed.
3. Only self move things that fit in a small car. Buy a small car just in case this isn't your situation, and don't try and move stuff that requires shoving it in and tying it down with bungee cords. Just not worth the trouble. Let the movers take it.
4. Wait til the last minute to bring food and frozen stuff to the new place, otherwise all your meals become fast food and extra expense you don't need. Of course that means keeping a few cooking pots and pans at the ready. Or eat all your food at the new place as you make a zillion trips back to the old place. There is no optimum way to do this. I've tried every way and am done trying.
5. Pawn off things that are not up to snuff, on relatives or donate to shelters, Goodwill or ReStore. Don't bring things to the new place that are shabby and need replacing. Replace them after you move in and then won't have to get rid of them after moving them again.
6. Downsizing is a great concept, but really requires being ruthless. I thought I got rid of a lot of clothes, but aparently I am kidding myself. But I did get rid of a lot of shoes, so I'm not all bad, and since most of them came from the thrift store anyway...they went back to have another life with someone else.
7. Don't move anything that isn't the entire set, of whatever it is. And duct tape parts together before packing, so they are not lost. Get rid of most of your mismatched glasses, all plastic storage, and half used beauty products. Really.
8. Tools....ugh. We fought over this and I keep losing. My darling thinks he is possibly going to need some of these things in the future, just in case, even tho I won't allow him to fix the car, paint, work on the plumbing, paint, fix the non-existent lawn mower, do anything electrical or store anything in the crawl space. Because his balance is terrible, even the tall ladder has to go. I realize this strips him of his manly-man-ness, but that's the breaks. I have a set of my own tools and when I ask him for a Phillips head screwdriver, I am done with the project before he finds his.
9. Get new pillows.
10. Toss five of your six opened salsas.
11. Buy those big black garbage bags, strip your beds and put the bedclothes right in the bag. That way when the beds get reassembled, the sheets can go right back on and you can fall into bed immediately.
12. Pack towels, soap, shampoo and hairdryer in one of those bags and put it in your car. A hot shower before dropping into bed makes the move so much better.