Work from the lowest-emotion, highest-volume spaces toward the personal ones. Each pass is sort into keep / donate-sell / toss before anything gets boxed.
1. Storage zones first (garage, attic, basement)
These hold the most 'why do we still have this' volume and the least emotion — old paint and solvents, broken gear, boxes you never unpacked from the last move. Don't move broken things 'to fix someday,' and never move hazardous garage chemicals (paint thinner, old fuel) — dispose of them properly instead. Clearing storage first frees the most space for the least pain.
Start here: Open every still-sealed box from the last move; if you didn't miss it, it goes.
2. Kitchen — and eat down the pantry
Duplicates multiply here: extra mugs, gadgets used once, mismatched containers, expired pantry items. A tip that comes up again and again: start eating down your food weeks ahead so you're moving a small box, not a full pantry and freezer. Keep the workhorses and let the spares go.
Start here: Start cooking from the pantry/freezer now; keep one of each tool, donate duplicates, toss expired food.
3. Closets and clothing
Moving is the perfect forcing function for clothes. If it doesn't fit the life you're moving toward, don't pay to transport it. Donate while it can still help someone.
Start here: Pack only what you've worn in the last year; donate the rest before boxing.
4. Furniture — measure the new place
Big items cost the most to move. Check what actually fits the new floor plan and what you genuinely want there. Sell or donate oversized or worn pieces now rather than hauling them to the curb later.
Start here: Measure key new rooms; list furniture that won't fit or you don't love, and sell it.
5. Paperwork and 'just in case' items
Old manuals, expired warranties, paper you've been meaning to shred. Digitize what you must keep and recycle the rest so you're not moving filing-cabinet weight.
Start here: Shred or recycle outdated paperwork; scan anything you truly need to keep.
6. Sentimental items — last, and lightly
Save these for the end. A move tempts you to either keep everything 'to decide later' or dump it all in stress. Do neither: keep a curated few, photograph the rest. Don't pay to move boxes you'll never reopen.
Start here: Keep one memory box per person; photograph the rest before it gets boxed.