Are old nabob coffee coupons worth anything?

As a child I remember my mother savings Nabob Coffee & Blue Ribbon Coupons, and that was over 60 years ago.

It depends. If it's in mint condition and a collector's record then probably.

Some may have a collectors value i.e. The very first Sinclair spectrum 48k off the production line with authenticated documentation. Else to they are generally only scrap value which is low.

Yes. Used coffee grounds are being used for firelogs. A process of compacting and drying the used coffee grounds has been in place for several years. Used coffee grounds also make a good soil...