A deeper look into the Follow-up section...
To do: If you're too busy to deal with an email click To do to add it to you list for ticking off later on.
Questions: If someone emails you a question and haven't had time to reply, we add it here as a reminder.
Responses: If someone forgets to respond to a question you've mailed them, we add your email here so you know who needs chasing.
Meetings: If you get meeting requests and don't have time to reply, we add them here so you never forget.