It's never too early to think about what you're doing next summer! Current students, what about an internship or summer research experience? Check out this, one of our students is working at PTEI right now!
http://www.ptei.org/interior.php?pageID=198
New students, you should be researching these well in advance, here's a great list of resources.
https://cms.amherst.edu/academiclife/departments/neuroscience/summerresearch