Door #4) Cut Russia off from the rest of the world. Finances, resources (raw materials), finished goods, trade, everything.
It's in progress. Boeing and Airbus are refusing to sell any more spare parts to Russia. Not unlike all the airplanes the US sold to Iran pre-79, they won't be any good if they break the wrong part with no replacement.
There's a story going around that a Georgian replenishment ship refused to fuel a Russian tanker. It's made to sound like it was entirely out of anger at Russia for invading Ukraine, but there's also the simple fact that any payment from the Russian company (in Rubles) would be worthless.
Did the captain want to support Ukraine or did he know he wouldn't get paid?
In any case, telling the Russians to "row" is pretty cool (if it's true).
While no one country or type of embargo will be enough, the cumulative effect of all of the world cutting Russia off is having a serious effect.
I can't see Putin lasting more than a month or two like this.
I don't know how long Ukraine can hold out, but it's now a 'who gives in first' situation.