I've tapered caffeine successfully by measuring out instant coffee. This works pretty well for managing the physical effects of caffeine withdrawal, or at least

I've tapered caffeine successfully by measuring out instant coffee. This works pretty well for managing the physical effects of caffeine withdrawal, or at least spreading them out. Basically, I 1) committed to only having the same exact amount of instant coffee, at the same exact times, every day, and then 2) every so often, reduced it a bit. Then I switched to a very moderate amount of decaf (which, yes, has a little bit of caffeine in it, but not enough to cause me problems). I did this because I was getting withdrawal headaches most mornings, which is an unpleasant way to begin the day- I wasn't even drinking that much caffeine!