Answer:
1) The U.S. imposed trade restrictions/trade embargo
2) Planned an invasion, the Bay of Pigs, which was ultimately a disaster and loss for the U.S.
3) The U.S. attempted to assassinate Castro 8 times.
4) President Kennedy prevented any business to be conducted with Cuba.
5) I'm not sure if this counts, but the US responded in great fear to not only Castro's rise to power as a communist leader, but also the fact that the Cuban Missile Crisis was enough of a scare.
6) for extra, the US ended diplomatic relations with Cuba.