If you use Apple's Reminders app to keep on top of your chores, events, and tasks, there's a convenient feature you'll want to try out. The Reminders app now allows users to tag a contact when they create a new reminder. Once you do this, a reminder notification will pop up on your iPhone next time you use the Messages app to text your tagged contact. We've already gone over how to use Siri to add reminders to lists, and how to group related lists in the Reminders app. Now, let's learn how to stay organized by tagging a contact in a reminder, so you don't forget to include key people in your plans.