Cues

Highlight any of the widget's icons that you associate with a thought you wish to remember.
By creating such an association, your thought will come back to you once the highlighted icon strikes you.

The effort for creating a reminder is reduced to a minimum - a single button click.
This strategy is in contrast to a cumbersome reminder/ToDo app, where you
-need to start the app
-type the title and/or description for a reminder
-set the priority
-set a due time
-etc.

Not only creating but also reviewing active reminders by merely bringing the widget to focus is as simple as it gets.