Throughout the seed cleaning process, keep in mind that your objective is to separate as much debris as possible, but within reason. One of my favorite tools is a pharmaceutical pill counter, not for counting seeds, but for pouring seeds into small envelopes. Since these are promotional items given to pharmacies by the drug companies, your local pharmacy should have several to spare. Storing seed is easy. While some collectors prefer foil, and some prefer plastic zippered bags, my preference is for glassine envelopes.
Small envelopes can be hard to find.
Dry the seed for several days on a newspaper before bagging. Seeds in berries should be extracted and washed first. A small marine or RV type refrigerator in your garden room, some 3 x 5 card file boxes, and a supply of small envelopes work the best. My seeds are refrigerated as soon as they have been packaged and labeled. This advice is for the efficient storage of 100 to 400 types of seed, along with your seed potatoes for next season.