Since everyone is relating their experiences, I thought I'd relate mine.
3 years ago when I was 60 years old I finally managed to get on track by getting into ketosis.
Duration: 6 months
Starting weight: 247
Ending weight: 195
Food eaten: coffee, heavy cream, water, pork, beef, chicken, liver (beef and chicken), eggs, fish, seafood, butter, coconut oil, lard, salt, pepper, onion powder (yes, no fruit or vegetables of any kind). Variety doesn't really matter when you don't feel hunger except when you are truly hungry.
Supplements: fish oil and D3 due to living up north where the sun has trouble appearing and when it does it's so weak it has no impact even if you could walk around in shirt sleeves, which you can't 6 months of the year.
Frequency of meals: coffee with cream in morning, dinner at around 6 pm. No snacking.
Excerise: Just walking although I did make excuses to walk more by taking another bus to work that would allow me to walk at least 1 km each way during spring, summer and fall.
What did I count? Nothing. Jumping on the scales every morning is all I did. No strips, monitors, macronutrient component percentages. Zip, nada, nil.
How I felt: I felt better than I did in my early 20's. I had energy to spare. If I had lost some more weight I could have probably done cartwheels. I was happy all the time, my arthritis disappeared with my migraines and depression. AND the biggest thing was no hunger.
Cholesterol tested at around 6 months in: My overall cholesterol was 182, HDL 65, Trigs 104. Ratio around 2.8. We are talking absolutely fantastic for a post-menopausal 60 year old woman who was still overweight at 195 lbs.
What brought me down? Chili powder. We need to keep things simple and I started my first experiment to my utter downfall.
Keeping it simple so that you don't worry and stress out about all those things is the secret. So now I'm starting all over again but at least I know what the key to my success was.