As a graduate student, I am assuming you live cheap, work a lot, and travel. If so, these sites may be of some use.

Flightstats — If you have a day of travel ahead, know someone who does (and who’ll you’ll be picking up at the airport), or are booking a ticket and want to know which flights/airlines/airports are always delayed, this is your website. So, by default, this is your website. Extraordinarily useful for the traveling scientist.

Seatguru — So you are online booking a…