I’ve tested lots of to-do apps over the years, but nothing has outperformed my inbox.
Origen: Why Your Gmail Inbox Should Be Your To-Do List
Why Your Email Inbox Makes a Great To-Do List
Create labels to sort your to-do items into the right categories
How to create labels and sublabels in Gmail
Create filters to automatically sort your emails into labels
Use Gmail add-ons to move emails to the other apps you use
Use canned responses to quickly get to-do items off your list
Use Gmail’s snooze feature to minimize distractions
Use stars to isolate your tasks for today into a separate list