Whenever I start working with people to review their nutritional habits, I like to try and add in, before deducting.
Experience has taught me that being told that you shouldn't have this or need to remove that instantly makes the offending item(s) even more appealing and trickier to address.
Instead, I would suggest putting more focus on including some of the healthier food choices into daily meals and snacks.
According to a government health survey carried out in 2019 Health Survey for England: Fruit and vegetables (hscic.gov.uk), less than a third of all adults were meeting the recommended guidelines for fruit and vegetable consumption.
Before stressing over telling yourself you mustn't have this or shouldn't have that, try prioritising what would be wise to include - like fruit and vegetables - daily.
These are recommended for a reason! They are packed with micronutrients that help lower the risk of health problems, such as heart disease, some cancers and stroke. They are also a great source of dietary fibre - assisting in keeping a healthy gut and reducing digestive issues. They are also really tasty and full of flavour.
When you start taking on board more of the good stuff, you might find you notice a change in your energy levels, you may feel less likely to eat only the lesser nutritious options and you might just feel a bit more empowered by your action to improve your health and wellbeing.
You can find more information on portion sizes on the NHS website, as well as a host of healthy recipes, or feel free to get in touch if you would like to talk more about your habits, choices and behaviours around food.