Good question. The EU and the US have let this develop to such a stage that there is no clear way forward now. However, our endless stern statements that Russian behavior is not acceptable and won't be allowed to stand is not helpful when Putin immediately demonstrates that he can do anything he wants.
Options that could be considered include answering Ukraine's request for NATO vessels to patrol the Ukrainian coast, the immediate accession of the Ukraine to NATO, the provision of defensive systems to Tbilisi against air or artillery assault, and many other items. We should not validate Russian control of Georgian territory and facilities outside of the two disputed provinces.
I’m just uncomfortable with NATO. The Ukraine thing seems Okay to a point. But we can’t let this get out of hand.