Once you save the seeds in a separate bowl from the pumpkin pulp, place them in a strainer and rinse well with cold water.
Pour the rinsed seeds onto a cookie sheet lined with either a paper towel or a kitchen towel (kitchen towels work best). Sometimes if you let them dry too long on a paper towel they will begin to stick and nobody wants to eat paper towel with their seeds. ;)
Also note that you might have to flip them once in a while to make sure they get as dry as possible.