As full time RV dwellers, we just can't have a lot of stuff.
Twice a year (April and October) we go thru our possessions and donate/toss what we're not using. Clothes, small housewares, dvds, books, blankets, etc.
We have a small pile of leather jackets and clothes that we'll donate when we're in northern Mexico this winter. My Fella has already carted away dozens of recycled nursery pots to a buddy who owns a retail greenhouse here in the BC wilderness.
And I just heard about a book sale for the local SPCA so I can unload most of my paperbacks and a few movies on dvd.
This lifestyle isn't for everyone, but it's been 4½ years and we still love full time RV-ing. It's actually hard to imagine ever living in a house again and having all that stuff to deal with.