I'm not cooking with a special pizza oven; I'm just using a regular oven with a pizza stone. However, I don't have a pizza peel. What can I use to put the pizza onto the stone? Any way I can make a makeshift pizza peel? 
Use a cookie tray.  Turn it upside down.  Place a piece of parchment on the upside down tray.  Build your pizza on the the upside down, parchment covered tray.  Slide the parchment, with pizza, onto your pizza stone.  You may find a spatula or tongs helpful to reverse the process once the pizza is cooked. Edit: In an attempt to make those of you with concerns feel a bit better, just wait a few minutes, until the crust firms up, then slip the parchment out.  Finish cooking without parchment.  Use tongs or spat to remove cooked pizza back to underside of tray. 