The ones I remember:

Previously, the state owned a large percentage of companies, and positions depended on political affiliation rather than efficiency. Change: Privatization.

There were strict import controls to “strengthen” the domestic economy, but this killed competition and stunted development. Change: The economy was opened up.

There were price controls, which increased shortages and the black market, and ration cards were created. Change: All of this was eliminated and the economy was liberalized.

The central bank printed money at a rapid pace and set interest rates for populist purposes, causing inflation of 500% officially and over 1000% if the black market was also taken into account. Change: The central bank became independent and completely technical.

But it wasn't perfect; it could have been privatized further, they could have moved towards 100% reserve banking, followed the gold standard, or allowed free competition of currencies. More could have been done, but it wasn't. In any case, it worked until those nostalgic for Allende's ideas arrived and reversed all the progress under the guise of equality.