The single thing most responsible for my success is discipline. Motivation has a short shelf life. This is relevant on this forum because this is also true about beating addictions.

I tracked every single thing I ate, every day, no exceptions (even if I am guessing or picking a similar item that might be way off). I still do. I use myfitnesspal site/app for that. I bought a digital food scale and weigh food whenever possible; guessing at portions is a big source of inaccuracy.

I weigh every other day with few exceptions (weekend away or forgetfulness are the exceptions) always first thing in the morning before my shower. I still do. I set my calories goal to lose at varying rates during my loss, slowing down when I got closer. I eat pretty much whatever I want and just limit portions and make tradeoffs. the calories tracking app also shows me were I am with protein, carbs and fats and I just make sure I am getting at least the minimum of each.

I walk a lot and I don't log it all as exercise to give me more calories. A lot of people get into trouble because some of the walk tracking apps give you fantasy calories (way more than you burn). I adjust numbers based on results on the scale.