Psychology Students or Professionals... Please help?

This is a general research question. I have been a psychology student since Dec of 07'. I do have access to peer reviewed articles and our school's online library (I am an online student). Right now, I am not researching anything in particular. I am looking for general, reputable sites for future research. My problem is that our teachers ask us to also use internet resources. However, in order to conform to APA guidelines the internet resources I use must be from reputable sites. As a student I am a student member of the APA (and have access to their articles through my school). Sites like Wikipedia.com are not considered use-able. I am just wondering if there are any general sites that can be trusted that you use in your research. I have trouble making sure that my online resources are valid... yet my teachers ask me to use them. Thank you in advance for any help that you might be able to provide. As a student who has only recently returned and had been out of school for 10 years until my return, research online has been a difficult part of my studies.