To view a list of all missions you have flown, as well as missions you are signed up to fly in the future, sign in to VPOIDS and click the Mission Summary link on the left hand side of the page under Reports. This brings you to three tabs separating your future missions, pending requests, and past missions.
This is the best place for you to go to access up-to-date information on any missions you are assigned to. This is especially helpful if you have misplaced the e-mail with your mission itinerary, or if you did not receive an e-mail and want to check if you were assigned a mission.