“Be healthier” is an understandable aim, but it does not tell you what to do after breakfast tomorrow. A useful habit turns that intention into a clear action.
Make the action specific
Choose something you can recognise when it is finished. “Take a short walk during my lunch break” is clearer than “move more.” “Put tomorrow's lunch in the fridge after dinner” is clearer than “eat better.”
Pick an action that fits your circumstances and any individual guidance. There is no need to start with the hardest version just to prove you are committed.
Give it a place in the day
Write down when and where you will do it. Link it to something that already happens, such as finishing a work call, making breakfast or packing your bag. Put any equipment or ingredients where you will need them.
Think through the likely obstacle. If your lunch break is unpredictable, what other suitable opportunity could work? If you often forget, would a calendar reminder or a note beside your lunch bag help?
Record useful information
If the habit has been assigned in Muscleactive, mark it complete after you have actually done it. If it is your own informal action, a simple note is enough. The record is there to help you understand what works, not to create another reason to be hard on yourself.
After a week, ask whether the habit was clear, realistic and useful. Make it easier or change the timing if needed. You can build on a habit that fits your life.
Your next step: write one sentence: “After ___, I will ___.” Choose one action and give it a fair try.
Further reading: NHS ideas for making activity a routine.