Record your daily studying activities, daily hobbies or interests that you engage in. I recommend devising a weekly chart to allocate the appropriate time to study each module or subject area. This will ensure that you assign enough time to study each topic.
Having a structured schedule encourages good habits of organisation and prevents you from putting off tasks that you find overwhelming. If you have scheduled it in your calendar, it will be harder to distract yourself from completing it.
Helpful hint: Have a checklist for topics you will study on each particular day. Ticking off subjects you have studied also makes you feel good about yourself.