I have been trying to do my part to keep them afloat. Whenever I get junk mail I do not want, with an enclosed business reply envelope, I send all the stuff back (after removing my name/address info). Especially good for unwanted credit card offers. Sometimes they are quite heavy.
I do that too
I do that too - especially the political begging letters I get from the RNC and such, with as much as I can stuff in them!