Indeed, there are vast regions within science to cover and widen. This is especially true within neuroscience; for an example, the American war on drugs has prompted much reinvestigative research into the side effects, healthy and unhealthy uses, and risk assessment of drugs. Such findings are incredibly important when considering the broad use of drugs in clinical practice and treatment. They are also useful for both shedding light on and confirming underlying neural mechanisms, as well as highlighting related psychosocial issues and why/how drugs are used. Another hot vein of research is consciousness and intelligence/complexity. In particular, the Blue Brain Project (1)(2)(3) is attempting to model a virtual brain from the ground level of neurons and molecular biology to higher-order functions like thought and emotion. It's fascinating stuff, and likely the key to not only clarifying what goes wrong where within mental disorders, but also to constructing true "artificial" intelligence. (I hope we're ready for the latter.)
To properly answer your question: psychology and neuroscience are my college majors, alongside minors in biology and philosophy. I have found that voraciously reading everything has a two-fold benefit: it crystallizes and expands classroom material and makes research easier. Both have opened doors for researching with professors, which is lovely for personal achievement and academic advancement. There is also the rising number of college graduates, increasing graduate-level competition, to consider; mastery and experience are essential. Knowledge is power.