Boil pasta as directed on package. DO NOT OVERCOOK. When done, pour into colander and rinse well with cold water.  Allow to cool and drain completely.
Toss cooked tortellini in a bowl with a little olive oil.  Either store in a container in fridge, or go ahead and skewer the pasta to serve immediately.
Serve with pasta sauces of your choice, but my personal favorite is pesto (which I also bought premade).