For you pros this will be a “well duh!” but I’m delighted. I just figured out how to do this.
One of my favorite features of Things 3 is the quick entry feature. By invoking a keyboard shortcut a Things 3 task window pops up for entering task information. This is a great feature for when something suddenly comes to mind. Hit the keyboard shortcut, enter the todo, and get on with your work.
I’ve been able to replicate this by creating a Reminders Shortcut on the Mac and then adding the keyboard shortcut for it. Works like a charm!