My DH is in negotiations for a new job in Florida so we are looking at a possible move from Wisconsin. Destashing is a way of life for us right now. I took 9 trips to Goodwill this week and I am sure there will be more. We have given away tons of stuff to family too. At first it was really difficult to let go of some things but now it has become a sort of cleansing feeling. It's kind of freeing to get rid of so much unused stuff.
Even more than getting "space", I think this is the important part of de-cluttering for me. BTW, great comments; it is amazing that even after doing this for months and recently finding the de-stashing thread here on the Budget Board, there are still wonderful posters providing even more insightful and helpful posts. For me, I started in the smallest closet and expanded. Just having small victories seem to encourage me to get rid of even more. I felt like my basement was an impossible task, but started with a shelving system on one end and moved forward (only laundry there, no rec room or finished space.)