If you plan on going to grad school or anywhere else after college than something that would be very helpful to ones application would be research experience. Since Cal loves us dearly they made URAP! Yay URAP! Well URAP basically is a website with a bunch of descriptions for research positions offered by professors and to get the position you have to fill out a URAP application, which includes a statement of purpose that is around 400 words each. In order to minimize shopping they restrict you to applying to 3 internships, which is bad for me because I have to pick 3 out of the 4 I want. Since URAP is open to all UC Berkeley students than the turn out tends to be really good for bio spots with some openings receiving up to hundreds of responses. So check it out!

http://research.berkeley.edu/urap/