You, of course, are primarily responsible for your own learning. However, this does not mean going it alone—especially when the going gets tough. Despite the Loner Hero so beloved in MIT culture, most projects, both at MIT and in "the real world", involve teamwork. Think robot competitions, design teams, the Mystery Hunt; think the Red Sox. In learning, though, you're not just a player on the bench or the field: you're a free agent managing your own team, selecting teammates and coaches who can help you succeed.
The tips, tools, and advice provided here should prove helpful, but be sure to also consult additional resources and support offices too.