I gladly confirm the earlier: make sure of an absolute state of relax. Eating and drinking and relieving are important points. Clothing is, too: dress as you would for changing a wheel on your car, and get a habit of wearing light shoes. You will (not on the first lesson, perhaps, though) need to work and feel the rudder pedals, so barefoot won't do but neither will heavy boots.
Oh, and wear (or not) the same glasses as you would for driving. Do not believe sunglasses are a must, or fashionable. I NEVER wear any, neither for driving nor for flying. If you take glasses, they would be mentioned on your medical (you DID make sure to have your medical, first of all, I trust?) and you might be required to carry a spare set - that is a rule over here, at least.
Still regarding the state of relax: arrive early. Take a walk round the field, take a good look around. It will be nice to recognize that church spire or the power plant, and realize how different they look from above. (the church spire will be visible from perhaps 5NM or so, the power plant might easily be from 50 NM, depending on the weather).
As an afterthought: and don't be too disappointed if your lesson gets cancelled. There may be a zillion reasons, instructor reported sick, plane bent on previous flight, a/d closed due to weather or runway flooding, you name it. My first flight planned after the winter stop had to be cancelled cause I couldn't get the bird out of the bloody hangar: the doors were frozen closed.
Above all: enjoy, enjoy, enjoy!
Last edited by Jan Olieslagers; 6th March 2012 at 16:35.