For a long time I rode with a back pack and/or a pannier and I was getting tired of dealing with a sweaty back and/or packing constaints. I made a trip to Home Depot and cruised the basket isle to see if I could find something assist me with my packing needs.
I found a basket that fit rear rack perfectly, but the basket had a larger cousin that appealed to me more. I ended up going with the larger basket and it has worked out great. I can make the basket "smaller" by just packing heavy stuff near the front, or I can distribute lighter stuff, like the suitbag I take to work with my work attire.
I attached it with some pipe clamps and now I just need to wait for election season to end so I can scour the local trash for coroplast election signs to line the basket with.