If you read the first lesson, you're familiar with the method of dragging a message to the Tasks button in the Navigation Pane to create a task from a message. The task helps you keep track of what you need to do, based on the information in the message, but it's separate from the original message.
An even easier way to keep track of what you need to do, based on the information in a message, is to simply flag the message for follow-up. When you flag a message, you'll remember to attend to it — even if the message starts to sink to the bottom of your Inbox.
In the picture, we've shown a message in the Inbox that has been flagged with a follow-up flag. Notice that the flagged message also appears in the To-Do Bar.
Tip Another quick way to attach a flag to a message is to drag the message directly to the To-Do Bar.
Flagged messages show up in many places
Messages that you flag for follow-up not only show up in the To-Do Bar, they also show up in your task list and on your calendar. That's to help you remember to do the things on your list. And, if that's not enough, you can set reminders for them so that you actually remember to follow up.