Try not to eat between breakfast and the following day's breakfast. You'll be shocked at how difficult this is. Our ancestors went for days without eating; there were not refrigerators, or even agriculture, for most of humanity's existence, so we either had fresh food and ate, or we starved.
Because of this eating/starving cycle, a symbiosis formed, between us and the bacteria that live in us. Think of these bacteria as an extremely blue collar workforce; it's hard work, but you get the job done and then you die. When times are good the populations grow up, but they always stay in balance.
Fast forward to today, and most of us have abundant food available anytime of the day, and for many of us, this food contains such cheaply available calories (glucose, fructose, etc.) that we have created a welfare state for bacteria. Just like with a human welfare state, it's no longer the bacteria that serve the most important purpose that thrive, it's the bacteria that reproduce at the fastest rate, given the available energy medium. As a result, our immune systems are partially tasked with destroying bacteria that have no business existing in our bodies in such high numbers. This wreaks havoc on our health more than any other thing we do.
There are various schools of thought when it comes to fasting, but, as a general principle, fasting, to some degree, on a regular basis, creates a biome inside of you that more closely represents how we naturally existed before the advent of french fries and corn bread.
None of this is medical advice and I am not a medical professional.
Coffee has been bad for me. THere were periods when I used to work an office job when I'd slam 3 or 4 cups every morning. Too much coffee makes me sweat and get jittery. I felt addicted for a while. What I mean is I'd have withdraw or a hard morning without the coffee. It was like a drug. I needed my fix or I was gonna get less work done. Also the coffee gave me acid reflux.
Now i stick to just one or two cups coffee, made kinda weak, and drink more water
I'm gonna try to get creative and make some good home made iced teas this summer. Might experiment with some different kinds of tea leaves and do some infusion with stuff i pull out the garden.
I gave up coffee for similar reasons. Very sensitive to the caffeine and messes with my blood sugar and mood - makes me very snappy and short tempered. I have black tea now and then switch to caffeine-free drinks for the rest of the day. Much better for me and everyone that interacts with me.
That's a good idea (the tea), that's something I don't really ever drink but I do enjoy. Pertaining coffee, same here, I used to drink giant amounts of coffee, but now I only drink about two medium sized cups per day. My routine involves filling the coffee cup one time and then refilling it when it's about a third left, and it's a fairly large cup, so I figure if I end up drinking most of the second filling then it's about the equivalent of two medium sized cups, which is not too horrible.
I definitely enjoy coffee so much that I can't imagine not having it. Part of our survival prep is some Pilon mylar sealed coffee that I buy every year and throw away the last year's. I've never even tried this stuff, but I figure it'll be better than nothing when SHTF and I've got enough to last my wife and me for about a month (only a month, since it's a semi-luxury item).