Other people's advice
One word: Plastics



Or perhaps revamped for my generation But trust me on the sunscreen.

When you suffer some travesty of graduate school--when your advisor gives someone else your teaching slot because he assumed your engagement meant you didn’t need the assistantship, or you walk in unannounced to your major professor’s office only to find her on the floor with your lab partner--tell yourself: it will make a good story later. Try hard not to collapse and act as if your life is over. Grad school is full of travesties. If you’re good at what you do and have reasonable resilience, it will be OK.

Grad school, and life in general, really, is full of unfairness. In undergrad, the stress of academia is somewhat mitigated by the fact that you're considered something of a protected species by professors and the institution in general. Grad students tend to have to deal with more responsibility, both in personal life and scholastic careers. Academia is great because your schedule is relatively fluid aside from some absolute deadlines. Academia is awful because your schedule is relatively fluid - aside from some absolute deadlines.

In grad school and adulthood in general, the best advice is "know thyself". 90% of time management advice I've read simply doesn't work for me. I'm a multi-tasker, and absolutely cannot concentrate on only one thing for more than about an hour unless under extreme duress (think, 3 hour SAT test). If I try, I end up staring blankly at the computer screen/article/wall. Some people are very good at setting their own schedules, and some people are better off having a side job even if it cuts into the absolute amount of time they have to work, because it helps them structure the time they do have. And yes, it has been shown (by researchers here at Penn State, even) that different people have different work completion strategies (that are stable over time, and difficult to change). To thine own self be true. Be realistic. Yes, you do need to start that 15 page report sooner than the week before it's due, but do plan to have time free that week to work on it if you suspect that's likely to happen. If you tend to work steadily, make time to do this. Keep in mind that what you're doing is actually, considered to be fairly difficult. It's ok to struggle at times, in fact, it's expected. It is how you handle that struggle that is important.

Polonius to Laertes in Hamlet, William Shakespeare:
This above all: to thine own self be true,
And it must follow, as the night the day,
Thou canst not then be false to any man.