Use Get Around To It until the job gets done. You may become aware of why you're not taking action on something and can work with another Paraliminal to solve that. For example you may be wanting to review what you studied but one of the core books you really need for review you have to borrow from the library again. You'd only be fooling yourself studying what you know, when you really need to review that book. Playing Get Around To It can make you aware of why you're not moving ahead. So you might be using that Paraliminal one day or one week.
As you note what's going on with you that's the best time to select the Paraliminal to work through it. You can use as many sessions in a day as you have time for. As you say you are studying time is booked so I suggest using at the most 3 Paraliminals in a day.
The Paraliminal Accelerator is a coaching session and a Paraliminal session each day. You need to work out the goal you want to head towards using the Accelerator. It's good that you use a different Paraliminal each day with a purpose that works towards your goal. It could be used to finish your studies and what comes beyond that. If you don't know what Paraliminal to use follow the accelerator. Shifts will happen.
Alex