A recurrent point-of-emphasis I'm getting, in response to my eternal quest to "become a better physicist", is: "stay creative".
That being said: I have alternating bouts of creativity and depression.
For instance, as I write this, I have just come back from solving a problem (from the beginning) I'd been thinking about for awhile in the matter of about 10 minutes.
On the other extreme: I looked at a Hamiltonian H = q*p - q*p, said to myself "That looks like it curls", thought nothing of it, and just blandly chugged out a bunch of equations that were the result of turning a mathematical crank. In retrospect, I suspected a fit of depression.
That brings me to my question: "how do you "be a good physicist" and "be successful in grad school" if you're depending on such a sporatic and irregular thing as creativity to kick in on time to meet the demands of deadlines?"