What to do with your old Binoculars

Many times we birders buy a new pair of binoculars or a new spotting scope while we still have a usable older model. Sometimes we keep that one as our emergency auxilliary backup. But overall, it can be a waste to leave a perfectly good pair of binoculars or a spotting scope languishing in a closet when it could be doing an enormous amount of good. Some choices: