Agree. If I don't drink coffee for a couple of weeks, which I rarely do due to the extreme migraine from withdrawal (3-4 days), and then drink one with half a spoon of coffee, I'm extremely alert and focused for house. Now I'm drinking like at least 10 cups a day with zero benefit.
It is easy to quit without headaches - slowly reduce your caffeine intake over a few weeks. Quitting cold turkey (abruptly stopping) will give most people nasty withdrawal symptoms.
I regularly give up either (a) using caffeine only pills and breaking them to linearly decrease caffeine dose, or (b) measured reduction of instant coffee over time.
Start at your current caffeine intake, every morning take one dose (might start high) and reduce slowly over say 3 weeks. It requires significant patience and self-control, but it has worked for me. My main problem is ensuring I don't have social coffees: it is easy to fall back into the habit of drinking coffee if I don't follow the titration regime.
One easy thing you can do to reduce your caffeine intake is to drink 1/2 caff or have every X coffee be decaf. I switched to 1/2 caff and tapered down, that was a lot easier for me.
