The Reminders app in IOS and Mac OS is a great way to keep track of things to do. Writing Shed lets you set up reminders in several places. In the Mac version you will see a Set Reminder button at the bottom of Inspector windows. Clicking the button displays the following panel:
Fill out this form to create a single/repeating reminder. These are added to a list called Writing Shed (what else!) that can be viewed at any time from the Reminders app.
In IOS you need to look for a button with the following icon:
You will find this on a text page, collections/publications lists in edit mode, and the information page for a submission. Here’s a screenshot of the dialog displayed when you tap the reminder button: