I've been a member of the National Fat Man's Society all my life. I've tried every diet that exists. All of them rely on eliminating certain foods or whole food groups from your diet. Either carbs or fats or both. They're impossible to follow in a restaurant, and nearly impossible at home. And you eventually feel "deprived".
Over the past six months, I've lost 50 pounds from a beginning weight of 325. I'm running out of holes in my belt. How? Nothing is a no-no. But I no longer cook a meal with meat, potatoes and veggies, and then eat it because I cooked it.
The other day, I made a roast beef and cheese sandwich for lunch. After the first half, I wasn't full. But I was no longer hungry, either. Wrapped up the other half and ate almost all of it for dinner. Tossed the rest. I've discovered the secret for me. I simply quit eating when I'm no longer hungry instead of when the plate is empty.
Same type of thing in restaurants. If I order a burger, I remove the bun. If the entrée comes with 3 side dishes, I order just one. They don't mind at all. And I never did like sweet stuff, so desert is no problem.
I still don't exercise, unless you count jumping to conclusions. But I'm no longer winded walking 30 feet to the mailbox.