One of my favorite sites is the one at medialiteracyproject.org
It takes many ideas from both psychology and sociology and helps teachers and students become more aware of the techniques used as well as the tools to examine and decipher the myriad images we see in the various media we consume. I will be posting various other aspects of that site as time permits. Meanwhile, check it out if you are doing any kind of media literacy in your sociology course. Great content for some semiotics.
This link I am sharing below may be the best thing I share related to media literacy both in terms of excellent content, but also in terms of techniques. Simply a great handout.
One particularly good overview is here:
The Teaching High School Sociology web site