Here's a tip for you iPhone users: if you want to quickly open your last email draft in iOS, just hold down the compose email button for a few seconds. Your last email draft will open up right away. Nice.
For those who need things spelled out:
- Save an email as draft
- Hold down on the compose e-mail button in the left hand corner of the iOS mail app (as illustrated above)
- Continue writing email
The email trick should work for you unless you've restarted your phone or closed the mail app. [Obama Pacman]