If you really want to get fit, there's one easy thing you can do that actually works: Take up a sport that gets you fit as a side effect. I have two obsessions in life: Rock Climbing and Surfing. I'm pretty good at the first, and borderline hopeless at the other, but I'm committed to the point where I've arranged my life so that I can travel for months at a time to pursue one or the other each year. When I'm working…
Also, don't eat boxed foods or foods that went through multiple stages of processing. In Defense of Food by Michael Pollan spells it out very well, but I'll just give you my simple definition: Eating healthy is as close to eating dirt without actually eating dirt. Produce, grain, cheese, 1/2 pound to a pound of meat a week[1], and whatever else Marion Nestle recommends[1.5]. Just imagine what primitive man would eat.…
What's wrong with cheese, or butter? Or sauerkraut and pickles? All processed food. Also, powdered mashed potatoes and puffed rice are just conveniently preserved starch. They're perfectly healthy.
The "processed food" and "mostly plants" stuff is just marketing psychology that taps into SWPLs' inner hippie. The real diet rules aren't mystical:
* Avoid sugar, especially fructose
* Avoid vegetable oils
* Don't be afraid of saturated fat
* Prefer rice and potatoes to wheat/rye/etc
* If you're fat, try cutting out starch, but don't worry about it if you're not fat.