I've 'quit' tea and coffee for long periods. It only takes a small daily quantity of caffeine to eliminate the withdrawal headaches. One 'Pro Plus' pill per day is probably sufficient (50mg anhydrous caffeine), reduced to half a pill per day after a week, then nothing after two weeks. Pills don't trigger the addictive yearning as much as the full coffee experience does. There's still sleepiness to contend with, however.