Beforehand, I knew I had a bad coffee habit. In a typical day I'd drink, maybe 6 or 7 mugs of strong coffee. I'd tried to cut down many times, but never succeeded; there just seemed to be too many reasons in my life to have another coffee.
So when Ash Wednesday (the start of Lent) came, I thought, "Now's the time to quit."
The first day was fine. I didn't notice anything. I guess I was still flushing the remaining caffeine out of its system.
The second day certainly wasn't. I had a headache, and felt tired, dizzy and confused.
The headache didn't last long, but the other symptoms persisted for about ten days. In hindsight, I should have consulted a physician before attempting this, because it could have aggravated other medical conditions I have.
I now have twelve days left of my caffeine fast. Do I feel healthier? Do I sleep better? No, not really; I feel pretty much the same as I did before, but without the urge to drink coffee all the time.
I think the real benefits will come when I let myself drink coffee again. I intend to only use it when I really need a pick-me-up. The less often I use caffeine, the more effective it will be.
[1] Lent is a period of 46 days' self-denial observed in many Christian churches.