Nothing would make me happier than if NATO refused to intervene on the ground, but TARPED the air space over Ukraine, making it a "no fly zone" for either side. Dozens of F-35's, F-16's, F-15's, F-18's, Typhoons, Sukhois and Migs flying interdiction sorties, with all the AWACS, E3 and battle management support they would need in case the Russians decided to come out and play.
Take the Russian air advantage away, ship copious anti-tank weapons, supplies and ammunition into Ukraine from the West, and force Russia to fight a desperate, ugly, savage ground war across Ukraine.
Nothing would make me smile more than knowing that those 20 year old boys were trapped in frozen Ukraine, without air support, surrounded by the "home team", with their mothers waiting for them to come home in body bags and urns.
The goal for the West should be to make the fighting in Ukraine as nightmarish as possible for the Russian troops, so that they face as much suffering as possible, eating away at their will. You can't imagine the ground troops are terribly inspired to fight this war in the first place. If the West can pump in a steady flow of the advanced weapons and ammunition that they Ukraine needs to turn Russian boys into hamburger, their will to fight will fade fast.
Hang in there Ukraine. Stay ruthless. They came to destroy your country. Make it a living hell for them.