Automotive_site - 10:31 am on Sep 11, 2013 (gmt 0)
"My main sites (those which generate my work) have all bombed for no apparent reason and they remain on a downward spiral with regard to traffic. I am now thinking of retiring as trying to maintain any sort of Google rank is just too much work."
Don't give up yet. You may find that your sites start ranking again a few months down the line, espeicially when Google realizes too many webmasters who are not engaging in irregularity are being punished.