When I was working in an office all day I was so bored out my skull I'd go and make a coffee for something to do that wasn't sitting at my desk. Result was drinking lots of coffee. I switched to drinking hot squash (ie fruit cordial mixed with hot water) and spiced teas without too much problem - few days of headaches.

I'm thinking I need to cut back again but at the moment it's the chocolate I'm craving, probably again for the caffeine but also for the sugar.