Outside of the donations or magazines, the next best options seem to be to abandon them or use the mileage mall/iDine to get them up to a threshold to get something you can use (like the 5K intra-Hawaii or using them to redeem for merchandise or some other option based on what the program allows). From some other discussions, the airlines don't consider any balance less than 25K as a liability on the balance sheet so they don't really consider them as any value either.