Very slowly.

Seriously, we're cleaning out about 45 years of junk. My hard part is getting my husband to part with things. He wants to give all this stuff to our kids and friends (who don't want most of it) and that slows down the clean up while you wait to hear their answer.
I basically started going through each closet and storage space in the house. We've been filling up our recycle bin like mad and even using the neighbors. So much paper work that I kept, etc. I'm putting pictures and sentimental things into plastic bins and storing them in the front closet. When we move, we can just put everything in the closet into the pod.
I'm so glad that we don't have stuff stored anywhere but in the main house (no basement) and sheds (tools, lawnmowers, etc.) My girlfriend hired a dumpster when she moved and was merciless throwing stuff away.
My son's two brother-in-laws want the tools so they're going to clean out the shed for us. Hurray!!!!!!!!!!
Another option is to find someone who does clean outs for the barns, etc.
I like the idea of the clean up show.
Good luck. It's hard, and I get tired much quicker than I did when I was younger (for some strange reason