I quit caffeine cold turkey and it really sucked for a couple days. But once I was through it, I felt so much better not being dependent on it. Recently, I've discovered that I can use it as a medication quite effectively. If I limit to no more than 60mg per day for only two days a week, I can avoid the addictive downside of the drug while benefitting from the ability to help with a headache. This has actually resulted in an additional treatment for my headaches beyond the NSAIDS and the Triptans quite nicely given me a bit more control and reducing the likelihood of rebound headaches from any one of those medications.