Three ways to stop Putin's next power grab

What can we do now that will deter Putin from making a move against some of the smaller countries along the Russian border, especially Estonia, Latvia, and Lithuania?

We are sitting on the largest reserves of oil and natural in the world, with the potential of becoming the world’s energy superpower.  We should use what Providence provided.

Putin is a prideful man and takes his international reputation seriously. If his invasion becomes protracted, he will look weak. If there are considerable civilian casualties, he will look like a nasty bully.