If you consider that no food or drink is totally off limits - there are definitely a range of choices out there - you can then shift your thinking to "what are the best choices I can consistently make for me, to help me reach my goals".
Look at it like this:
The foods you choose MOST OFTEN should be the ones that make you feel, and function, your best! These foods provide you with the macro and micro nutrients your body needs to fuel your brain, your nervous system, handle physical demands and negotiate stressful demands.
There are also foods that you may choose SOMETIMES, not every day - more because they are convenient, or easy. These choices don't leave you feeling your best, but may in the moment be good enough.
Then there are the foods that taste good, are part of traditions, remind you of childhood, are socially significant, culturally meaningful and are about so much more than what the nutritional value is comprised of. These are the food and drinks that you choose INFREQUENTLY, once in a very long while, and you do so mindfully, knowing they leave you feeling less than great.
Consistency is KEY
Making changes to our lifestyle is tough. Especially when we hope to see results quickly or instantly. Start with small changes, manageable and tangible - increase your water intake by 500ml, walk for 10 minutes, add a vegetable to your lunch - noticing how these positive changes impact how you FEEL.