I know this comes off as insensitive but it can almost be hard to eat at a surplus if you're focused on hitting your protein and fiber goals while drinking a ton of water. Most people just starve themselves all day until they inevitably break down amd have "just a little bit" of whatever. Those cravings are nearly eliminated when you hit those other marks.really focusing on protein has helped me with this. I try to eat my ideal body weight in protein, which is almost 150 grams per day. That is not easy so when it comes to a snack, I always try to focus on things like greek yogurt or cottage cheese for snacks. Same thing with water and fiber.
Those are 3 simple goals rooted in positive thinking that can make almost anyone feel/function better.