They have yellow stars, blue stars, and a whole progression of simple, clickable icons by which you can sort your emails. I use three of them: blue stars, yellow stars, and green check marks. If an email needs a reply, it gets a yellow star. If it’s time-sensitive, personal, or just more important, it gets a blue star. A blue-starred email takes pr

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The email<>todo part of this workflow actually works reasonably well. Most of today’s email clients are built around the concept of Inbox Zero, which effectively turns your email inbox into a todo list with public write access.