Having had a not entirely satisfactory experience in the History and Science department at Harvard, I have been making notes ever since on how things might have been improved, and on things I wish I'd known before starting out.
Prospective concentrators in the department of History of Science at Harvard may want to check my notes, linked below:
http://blog.rlucas.net/bugfix/concentrating_history_and_science_harvard/
These notes are not intended to be universally applicable — caveat lector — but would help someone like me who was considering, or struggling with, a concentration in History and Science.