Well 30k miles a year = 3.5 hours of riding @ 23mph every single day {taking slow days into consideration}
Grad school will help in the dieting factor {Too broke to eat or drink crappy food}
California helps also..... Great weather, plenty of hills, dogs to chase you, SUV's to buzz you, therefore making you faster rider.
California doesn't help you also......... Hot girls/ guys everywhere from single soccer/baseball/football moms. To hot babes on the beaches, to Rosarito, cabo, UCSD, UCSB etc......
Training and nutrition well this forum might help you out...... But i doubt it though. Most people are to busy with Campy vs. shimano or steel vs. carbon ponderings. And when in doubt upgrade to the latest and greatest. It will for sure make you faster! And you at the very least look uber snazzy {matching etc....}.
Good luck........