[Liron]

Maybe you can add a Draft to the thread with a note to yourself about what the next action should be.

[sorum]

As a workaround, I kind of like that idea!

The other option is to keep the next actions in a separate list (or app), with a link to the email. Then you face the problem of context switching between 2 apps, so yours is better.

I just with that I didn't have to open the email to see the note I'd written myself; Inbox was so clever that the reminder was right under the subject line.