Remove old labels, extra tape, and old staples. Discard torn envelopes, or padded envelopes losing their stuffing. The cloth book bags are still an effective method of delivering materials. Some have clear windows with pockets for labels. A black magic marker makes the address stand out.
Cartons Try to distribute the weight in the carton evenly.
Center the main weight in the carton and surround with filler. The filler may be foam chips, popcorn, or paper for recycling. If using a large box for a small shipment, adapt the box by slitting the corners down to the top of the contents, then scoring the box vertically on all four sides. Seal by folding all four sides down and tape shut. Cartons should not weight more than 50 pounds.