Understand the question
When a useful action repeatedly does not happen, examine the situation before adding more motivation. A task may be hard to begin because the materials are missing, the timing conflicts with a responsibility, the first step is vague, or the plan is larger than the available energy. These are different problems and deserve different responses.
Pick one recent occasion and reconstruct it. What were you doing just before the planned action? What did you need to find or decide? What interruption occurred? Keep the account concrete. For example, wanting to read before bed is different from having a book available, choosing a stopping time for other activities, and being awake enough to read.
A practical way to evaluate it
Change one piece of the situation. Put the materials where they will be used, choose a smaller first action, or move the activity to a more workable moment. If the problem is an unreasonable workload, a reminder is unlikely to solve it; the next action may be a conversation about priorities or support. Do not use habit design to disguise a structural problem as a personal weakness.
Try the revised arrangement and make a short note about what happened. If the action still does not fit, ask whether the goal matters enough to keep pursuing or whether another approach would serve it better. Repeated adjustment is information, not a failure of willpower. A useful habit should earn its place in your life through the value it provides and the burden it creates.