Our process was quite drawn out.
We sold our house in 2004 and moved into an apartment while we decided if we really wanted to move to England (MrRed5 is English and had lived in the States since '92). Prior to moving into the apartment we started selling off items that we no longer needed.
The community we lived in had a flea market twice a year and that helped us unload items, and we sold items to friends at a reduced rate. The girls and I (they were quite young at the time) drove up to see my family and we gave my Mom some electrical items and my cousin our booze.

A week prior to moving we sold our cars to carmax and rented one. The movers came to the apartment on a Thursday and packed everyting up except for a couple of air mattresses and a few other items. Friday night was 'shred fest' as we shredded paperwork that we no longer needed. I'm sure our downstairs neighbors weren't pleased with us.
On Saturday we went to the local Goodwill to drop off what wasn't going on the plane with us. We dropped off the apartment keys and went to a friends house for a few hours. We had our last meal in Texas at IHOP, dropped off the rental car, and got on the shuttle bound for the airport.
I forgot to add that I had a notebook that contained everthing that I needed to either cancel (like electric and phone) or change the address on (like bank accounts).