This is heavily skewed toward America – not a criticism, just a nod that not all of it will apply here in the UK – but it’s an interesting read. As a freelancer, I see December as a bad time for getting new work but this argues the opposite for people in full time employment and has points I’d not considered:
http://feedproxy.google.com/~r/time/topstories/~3/o81VsOdo1EM/
From Time magazine