Parkinson's Law says that "work expands so as to fill the time available for its completion", meaning if you give yourself all day to do something, you will take all day to do it. This is why timetables are incredibly useful for study days. If you set time limits, you're more likely to get your tasks done within these timeframes, meaning you'll have more time for the things you enjoy.
The Daily Timetable Planner makes it easy to timeblock your study days. Simply transfer your To Do List into the table and add your timings. At the end of the day, there is also space for noting down the things you accomplished. You'll be surprised at how much you can get done when you plan your days properly!