So you see an older message from one of your co-workers or clients with the subject of “Requesting time to meet”, and it reminds you that you agreed to send info on an upcoming business event. Great that you’ve been reminded. Not great if you hit the reply button and keep the “Requesting time to meet” subject to send the info on the business event…
New subject–hit reply and use new wording in the subject line. Or – go out on a limb and actually start a NEW message. Now THAT’s a novel thought!