In no particular order here are some websites and blogs worth looking at:
www.authentichappiness.sas.upenn.edu
www.city.ac.uk/positive-psychology
www.positivepsychologynews.com
www.richardwiseman.wordpress.com
www.uel.ac.uk/positivepsychology
Please let us know if there are any websites you think should be added to this list by replying below.