In general, the best way to reach me is by email. If we are meeting in person at MIT, please note that I have two offices, one in the Math Department and one in CSAIL. I spend time in both offices, so if you are planning on meeting with me, make sure that we specify in which one we'll be meeting so that we both go to the same one!
CSAIL Office: 32-G618 (Stata Center, Gates Tower)
CSAIL Office: (617) 253-4591
Massachusetts Institute of Technology
Cambridge, MA 02139