You can now put a reminder on a contact. If you agreed to talk again in a month, there is no need to keep their campaign open and in the way of your queues: write a line or two and a date, and you will be reminded, even after their campaign is closed.
BlogLeads
Reminders on a contact
See it
for yourself.
The CRM is free for one person, and the rest of the suite is there when you need it.