You've played way too much when you start dreaming that you are chief of your tribe and constantly are being yelled at for only being able to produce Magic Food once a day!
OR
IF you are watching TV,see an old person, then run to your computer to see if any of your Elderly have passed away.
OR
You see someone who looks like they could be at least fourteen years old, and you wonder why they are not working.

Need I go on???