Reagan stood behind Volker as he cut the money supply. This stopped the inflation of the 70’s and set the stage for the great economic boom that followed. Volker would not have done this without Reagan’s support and willingness to endure one of the worst recessions since the great depression.
Reagan worked with Congress to cut taxes. When he took office top marginal were at 50% and at 70% for investment income. When he left they were at 28%. This huge tax cut spurred the economy into a boom that made the US significantly richer than most other countries in the world.
Reagan fired the striking air traffic controllers. He showed that the laws applied to everyone and that striking against public safety would not be tolerated.
His foreign policy was to win the cold war. His frank talk of the evils of communism let the brave souls struggling against the communism and the Soviet Union around the world know that they were not alone. He increased the military budget so the USSR would have to increase its and he knew they were already straining to bear the military budget they had. He worked with the Saudis to keep the price of oil low to lower the value of one of the Soviet’s main exports. He supported the Contras in Nicaragua and the mujahadeen in Afghanistan to drain the Soviet’s money and morale. He worked clandestinely to help the Solidarity movement in Poland. His spies were able to sabotage a pipeline that was vital to Soviet oil supplies. In response to Reagan the Soviets appointed Gorbachev to reform communism and try to keep up with Reagan. Gorbachev unleased openness which eventually resulted in the rise of Boris Yeltsin and the fall of the USSR. This fall is the single greatest victory for human dignity and freedom in my lifetime. The end of the cold war brought an end to the single greatest manmade threat to human existence. His confidence and focus helped achieve this at a time when most experts thought it was impossible.
That is just off the top of my head, I am sure I could come up with more if I researched a little.