I've been there too often myself. Good luck. Do all the usual headhunters and such, but don't use pay sites, they're scams. What kind of work do you do?
Now that you said HVAC, I imagine you might participate in tradesman forums similar to
http://www.electrical-contractor.net/ (this one is for electricians, but I've seen them mention the existence of HVAC forums). Such a forum may have a job category.