Dont know if you are doing GCSE or A Level (I'm doing A2) I would revise:
uses and gratifications
cultivation theory (gerbner)
hypodermic needle theory
queer theory
star theory
binary opposition
semiotics
postmodernism
psychographics
maslow's hierarchy of needs
don't know which theorists go with which but i know theres one called Levi-strauss and one called Barthes
hope that helps