In Outlook, if you right-click and drag an email message to the Tasks button in the bottom left corner of the screen, a small menu pops up. When you choose the option "Copy here as task with attachment" from this menu, a new task is created that embeds the email message (visible as an icon in the task text field). You can re-open the email from inside the task by double-clicking the icon.
I find this feature so useful that I switched to Outlook because of it.
Hope this helps,
oh nice! I never knew that before. Thank you Serge