All the stuff I own that I care about fits in just enough space to take with me on a plane. When I move, I just give away or sell things like furniture and kitchen stuff. It's not too expensive replacing it all with cheap Ikea items.
Lucky you. Don't have books or musical instruments? Those two are the biggest blockers for me. Furniture and kitchen stuff is easy to give away and buy again.
Edit: Things could be worse though. I play guitar, not drums. :)
I have instruments: some midi controllers and 2 audio monitors to go with it. I found a perfect sized bag that can fit it all, along with my computer stuff. I just have that bag, a big suitcase of clothes, and my carry-ons.
I do have books but not too many, and I don't take them with me. I keep most of my stuff like in long term storage (my parents basement).
