Apart from supporting Solidarity (and then help the economic bullying to make sure they didn't get any chance what so ever to have their own economic policies), I don't think much was achieved that the Soviet Union wouldn't have managed without US "support".

> When talking about Ronald Reagan, I have to be personal. We in Poland took him so personally. Why? Because we owe him our liberty. This can’t be said often enough by people who lived under oppression for half a century, until communism fell in 1989. ~ Lech Walesa (https://en.wikiquote.org/wiki/Ronald_Reagan#/media/File:Lech...)