You should also consider looking at the subfield you are interested in entering's website. I know for social psych, there is a website (socialpsychology.org) where jobs are routinely posted. Also, consider trying to sign onto your subfield's list serve and getting on the email list. I have seen quite a few jobs that are posted throughout the year there and would recommend it highly. I actually applied for the job I now have through looking on the social psych's job posting boards. Regardless, good luck finding a ra position! They are tough to come by, but the experience you receive is priceless and will go a long way towards helping build your application!
Good Luck!
