Since about February we've been on an organizing/sorting/throwing away/donating kick. We are limited by volume to throwing out by a big weekly bin. Every wednesday at between 3 and 7 pm, him and I go through some area of the house, boxes or storage, in every room of the house. Once the bin is full, we are done for the week. It's both exhausting and satisfying. And when we've done every room basement included, then we will thin again, through every box or area, and label anything in generic boxes. (china, fabric, christmas decorations, carving tools...)
A friend of mine that is way ahead of all the organizing has a sister that sells at flea markets. Her sister helps her taking her flea market items to market.