I've tried tracking what I eat maybe a dozen times and always quit within a week. The thing that changed it wasn't motivation, it was cutting the friction. A few habits that worked for me, in case they help anyone else:

• Take a photo of the plate before you start eating, even if you log it later. Memory is terrible by the evening.
• Rough is fine. A "close enough" entry every day beats a perfect entry twice a week.
• The usual suspects for underestimating are oils, sauces, dressings and drinks. Those are the ones worth weighing or measuring once in a while.
• Log protein first if that's your main goal, and don't stress over the rest of the numbers on a busy day.
• Batch-cooked meals: log the recipe once and reuse it instead of re-entering ingredients.

Disclosure: I'm an indie developer and I turned the photo habit into an iPhone app called Mealumo. You snap the meal, it estimates calories and macros, and you correct anything before saving. Mixed dishes and sauces still trip it up, so everything stays editable. It's in English only, needs iOS 26, and has a free tier plus an optional subscription. Happy to give a PRO code to anyone here who wants to try it and tell me what's wrong with it: https://apps.apple.com/app/id6811904664

Mostly though, I'm curious what made logging stick (or not) for you. If this kind of post isn't welcome here, mods, feel free to remove it.