"I think I'm in a bout of burnout right now. I've opted to work a full time contract, to fund my startup, while burning midnight and weekend oils for my startup. I think a vacation, of simply doing NOTHING would be a good idea."

Yup: but don't do nothing, do family. Visit parents, uncles/aunts, places near where you grew up. I check Mum out whenever things get really mad. A walk on the beach then we do a taxi to a nice cafe. Does wonders.