The plan should not only cover studies but other essential activities as well, according to me-

  1. You should plan a schedule of balanced activities. For ex- eating, studying, sleeping, outdoor activity, etc.
  2. The time should be divided between subjects according to your comfort level. For eg- if you are good with English and not so good with mathematics so more time should be given to mathematics
  3. Study at a set time and at a consistent pace
  4. Make schedule flexible, so that you can change it according to the need and preference