Summarize this article:

This method is more discreet and might be preferable to those who live in dorms or share a bathroom and don't want to rinse out their pads in front of other people.

Summary:
Lay down the pads on the floor of the shower with the dirty side facing up. Allow the pads to soak up the water while you take a shower. Wring them out when you are done with your shower. Leave them out to dry or add to your soaking tub. When you are ready to do your next load of laundry, toss the pads in the laundry basket and wash them with your clothes.