At the risk of a massive flaming, I would say there is no standard circuit.
The closest to a standard (in the UK at least) is:
Climb straight ahead to 500'
Turn crosswind
Climb crosswind to 1000'
Turn down wind. {In a C152 this should space you so that the runway appears about one third of the way DOWN the strut)
Abeam the threshold, look for a point on the extended centreline 45 degrees ahead of it, ie look at the threshold, turn your head 45 degrees towards the nose. When you get abeam that point, turn base, but DO NOT FLY TOWARDS IT.
On base, slow down, extend the first 10 or 20 flap, begin a powered descent.
As you approach the centreline, turn final, and you should be wings level over your (45 degree) point, ideally at 500'.
Note that I haven't even thought about drift, but you probably want to maintain the same ground track.
You'll probably have about 8 "standard" circuits described by the end of the week, just thought I'd be first!
[This message has been edited by Capt Homesick (edited 15 December 1999).]