Every RM has their own style for how they want to organize their time and track of their goals. Most who just recently returned are used to just using the paper missionary planner from Preach My Gospel. Some would prefer to use an app, some just write on their hand, and some use a large bulky planner.
Whatever your style is, we would like to give you some ideas:
Returned Missionary iPhone app (from the creator of RM Planners (paper)
RM Daily Planner (paper)
Writing on your hand