Kicking them out of the G8.
A pointless symbolic gesture.
An economic embargo.
Not happening. Europe would suffer more than they would.
Freezing any and all Russian accounts in the US.
This is just silly nonsense and would be illegal.
Cutting diplomatic relations.
That wouldn't hurt Russia, that would just leave the US no option to talk to them without going back on the empty threat.
Those are just a few things that we can do.
No, those are fantastic and not viable.
And if that doesnt work, we provide military and economic aid to Georgia.
Why? There's no amount of military and economic aid that the US can provide that would make a difference.
If Russia sees that as an "act of war", then they can respond.
But if they do, they will be seen as the agressor and NATO will have every right and legal obligation to respond in kind.
Now let's go back to reality:
Russia is not dumb enough to give the world motivation to engage them, they'll stay within this spot they are in where the world is simply not willing to engage them and they will do so with impunity.
There is no nation in the world willing to engage Russia right now, so what's your point? Provoke them into a confrontation that the world isn't willing to be part of? The US will not go to war with Russia over this kind of thing. Pretending that the US has the will and the power to do this is absurd fantasy.