Pose as a life model

You don't have to be beautiful or in particularly great shape but you do have to patient, able to sit still and perhaps not wince at what an artist makes of you. But good models are in demand.

Average pay: from £6 or so an hour clothed, to £7 or so an hour unclothed outside London; a little more in the capital.
More info: contact art colleges and adult education colleges near you.