How to streamline the use of reminders?

I have what I assume is a common scenario among people in sales type positions. I'll have an initial call with someone and need to f/u with them in a week or two. So I create a task under the contact and set a reminder to email them next week. So a week passes and I email them, but then I need to remind myself to check back in another week to see if I've heard back from them yet.

I'm not sure of the best way to set up this second reminder. Do people just create a new task, or modify the existing one, or is there a better option.

One idea that just came to mind would be a "remind" checkbox that would appear when hovering next to emails (and also the log a call function, and probably others). If you checked that box a reminder dialog would popup with the time and calendar (have an option in settings to default to a certain number of days in the future). So with one click you can remind yourself to follow-up on an email you sent or a call you had, etc... (one other request is that these reminders should show up in the calendar view along with events)