Whats up dan.
Here is what I use when I'm not in the mood. Ill mix 1 scoop of Craze with 1 scoop of stim free focus XT and that is repeated every 4-5 hours depending on how long I feel like studying. After it wares off, sometimes il use Demiurge, phenylpiracirtum, which really gives you some intense focus. I also use Stim focus XT before class from time to time just to kick start my mind.
It all boils down to , do you really want the job? If you don't feel likes studying then ask yourself why you don't feel like studying .