Everything that is done must meet three criteria:

1. It must help the Georgians;
2. It must incentivize the Russians to back off;
3. It must prevent an escalation.

That narrows the scope of action to stuff that is deniable, capable of being executed by proxy but effective. Basically the idea is to make it not worth the Russian’s while to keep going by inflicting cost, delay and embarassment. The classic method is defensive demolitions. Mining the ports, blowing the bridges, closing the roads, demolishing supplies. The Japanese held Okinawa for a very long time by delay, delay and delay. So while the Georgians might be fighting a losing battle, it is possible to slow the Russians down, especially if you have force multipliers. Whether or not the Georgians choose this very painful method of resistance is something we shall see.