In my opinion, the best way to treat this skin non surgically is the fractionated/pixilated CO2 laser.  Think 1-3 treatments with 2-6 months in between treatments.  Full results are seen between 3-6 months after the laser treatment.  Surgery may still be your best option if you have a lot of loose skin under the chin or neck, or a large, usually inherited fat pad there.   Dr. I