I’m trying to cut out the soft drinks at lunch, but it’s a calories thing, not a caffeine thing. Today, around 1:30, I started getting very annoyed with the headache I’d suddenly acquired, and I felt too tired to concentrate on anything. It took me this long to realize it’s because I forgot to chew my half-piece of Jolt! gum after lunch.

This is like trying to quit smoking, but lamer.