This is not even remotely close to a "recipe", but I think it is so great I felt the need to share it.
Don't you just HATE when your taco shells close while they are cooking? How else are you supposed to shove all of that deliciousness into your shell? Here is your answer.
Separate your oven racks a bit, put the lower one all of the way done and spread a piece of aluminum foil on it. The foil is there to catch any oil that drops. Preheat oven to the necessary temperature.
Load your shells DIRECTLY on the racks as per the picture below.
The tricky part is getting them out, if you are like my mother (and I attain to be), you have asbestos hands and you just reach in and pull them out while mocking any other weenie in the room.
Otherwise, you may want to pull the rack out a bit and try using tongs (just don't crack them) or an oven mitt but I they tend to be too bulky.