If you want to change what or how you eat, there are three main things that you can do: 

get Motivated

take Action

use (or avoid) Prompts that make you eat in a particular way

This approach is called MAP, and it’s used by the NHS. 

Making a change

• Find out about the benefits of changing what you eat or drink
• Set a clear goal, make a plan and think about what could make it difficult to stick to the plan
• Leave yourself reminders about the changes you want to make