The easiest way to remember the differences is the fact that, for this period in particular, they are inherently opposite ideals. Capitalism in the USA at this time denoted democratic elections for government from several parties that represented different perspectives and sectors of the country. Communism in the USSR was the opposite - totalitarian with no choice or opportunity to elect a government from representatives. This opposition is seen right through the rights and freedom of citizens - capitalism placed more value in individual rights and freedom where as communism had a more collective perspective to ensure cohesion and a 'respect' for the state. This is particularly evident in the media and press of the era - capitalism assuming freedom of speech and publishing where as communist governments having a complete monopoly over what is published and said amongst the citizens.Of course, the most fundamental difference the business and economic practices. Capitalism places value in private business and follows a 'rich get richer' formula where people create business and make money for themselves -this often creates a distinct wealth divide. Communism, however, also has complete monopoly over business as all businesses are owned by the state so that, in theory, resources are spread equally to all citizens - further abiding to the collectivist perspective. An effective way to make sure you remember everything is ensure your point's 'opposite' so that you are covering both concepts. Remember to provide examples as evidence of understanding.