While I always suggest moderation and balance in all things, trying out a ketogenic approach (at least some of the time) has really helped me.
You may be surprised to learn that your body has evolved, and is therefore designed to run more efficiently on fat than on non-fibrous, refined carbs or sugars.
When you were a child, your body was probably able to use either carbs or fat for fuel, and switch back and forth, but as you age, this can change.