With economic sanctions and with supplying the Georgians with advanced weaponry. At least with effective AA weapons and anti-armor.
We could also threaten to speed up NATO acceptance for the other former Soviet states that wanted to join.
There is a NATO air base at Diyarbakir Turkey, about 300 miles from Georgia. There is a very large NATO base at Adana, about 600 miles away, that any aircraft in the USAF can stage out of. With the Turks you dont talk "stance" as much as you talk "price". Im assuming they arent to keen on letting US aircraft to stage on their territory to attack Russian forces in Georgia. But I honestly dont know.