Moving to a place half the size, did it for us. We keep hardly anything, compared to a lot of people, but there was some stuff we just didn't need. We had our 2 bedroom closets redone and had to think about solutions for our basement storage, especially for out of season clothes. We ended up with 3 rolling clothing racks. I also have 4 under the bed rolling storage things for linens in my bedroom and 2 in the guest room.
The only thing i miss is being able to pull out and look at my photo albums. They are in tubs in the basement.