Matt is absolutely right, and I would also add that we are a bit like Pavlov's dogs. When you study, do the same things every time. Maybe it is buying a cup of coffee or going to the library. Or maybe it's cleaning your desk up. Music can also spur this on. If you have a jazz or easy listening (think Sinatra not Kenny G, please) collection that you don't listen to very often, perhaps it can be your study music. If you play it every time you study (Perhaps even the same track at the beginning of every session?) then you will experience a conditioned response. Then, when you know you don't feel like studying and can't get your mojo going for it, when you pop on that music, it will create those study vibes in you.

One thing I think is important when developing these Pavlovian reactions is that they aren't associated directly with the dreaded activity. So, while notebooks, pens, paper, etc. are necessary tools for doing the work, they might only create the dread you're trying to avoid. But something unrelated to the task will create the response subconsciously.

I am not a psychologist.