The sanctions that the nations of the world have placed on Russia will drive their economy far down. And the withdrawal of international companies from the Russian economy will likewise drastically impact Russia. Hopefully this will lead to a negotiated settlement with Ukraine. And hopefully this debacle will bring about the end of Putin.
No one has talked about this possible saction, but it would be very effective. The nations of the world enact a substantial tarif on Russean energy imports, and direct the money for weapons and aid to Ukraine, and then towards rebuilding the buildings and infrastructure destroyed during the war. The impacts of this tariff would be felt in both Russia and the world energy market, and would hurt the world economy, and hopefully be only temporary.
One more way to whack Putin.