As you get older, the work you do becomes more complex. You may have coursework, or essays to write, or a project to complete. These are likely to take some time to finish, so make sure that you break up your work into manageable chunks. There are two things you need to consider. Firstly, think about a suitable point in your work to pause. It might be when you have completed a section of your project, or written one side of the debate for your essay. Secondly, estimate how much time it will take you to meet that mini-target. If it will take less than an hour of work then that's fine, but any longer and maybe it will be too much work to reach that point without a break. Using these two factors as a guide, try and 'map out' your work for the study session/evening/weekend.