Psychology Student Jobs and Paid Opportunities
Psychology Job Wiki - A "crowdsourced site that is intended to provide information to applicants about the status of academic job searches" (i.e., whether the position has been filled). They now have a section for "predocs" that lists positions for lab managers, paid research assistants, etc.
Other Paid Opportunities
Faculty frequently forward information they receive regarding research coordinator and lab manager positions at other institutions to the psychology majors and neuroscience majors email lists, so keep an eye on your inbox for additional opportunities.