One of the first things that you learn as a graduate student who teaches is that there is never enough time in the day to do everything you need to do. The second thing that you learn is how to juggle - appointments, classes, office hours, meetings, departmental functions (both social and official), your own classes, studies, projects, articles, advisors, committee meetings, and writing as well as your commitments to family, friends and other "significant others". Sometimes, you drop the ball - and then, as Murphy's Law states, everything else goes wrong, too.
DO NOT DESPAIR!!! It happens. It's part of that rite of passage known as "graduate school," and everyone accumulates their share of "war stories", which are as much a part of our particular culture as hot dogs are to baseball fans. It wouldn't be the same without them.
It does not, however, help much when you've just forgotten your class notes, missed a meeting with your major advisor, your child has the flu, the copy center copy machine is on the fritz until Doomsday - which is after you need them - and your carpool decided to leave early, and forgot to tell you about it. Great.
Understand that the "rules of the game" just changed.
Graduate school is very different from your undergraduate education. The rules are very different, and each discipline and department has its own version. A few things to generally consider are:
If your office/work space looks like the aftermath of a natural disaster or resembles a public health hazard, if you are perpetually late because you can't find your calendar, or if you can't find a conference notice that you think you're supposed to attend, you probably need to re-think your organizational strategies. Disorganization is akin to the last stages of entropy - chaos and disintegration.
There is a difference between "creative clutter" and complete disorganization. Creative clutter has a purpose and an order, whether the rest of the world realizes it or not. The difference between the two occurs when you cannot find what you need to function.
An excellent
place to start is with Stephanie Winston's Getting Organized.
It's a gem of
a book that allows
the individual to
get as organized as they can stand without going crazy. Another
classic is Alan Lakein's How to Get Control of Your Time and
Your Life. Neither of these books offer "quick fixes" or
are rigidly controlled. Both authors emphasize that time-management
and organization skills are highly personal and are skills
that must be developed in a highly individualized manner.
Most of the great mental disciplines of the world place a great emphasis on being fit to serve, with the basic idea being that if you are not physically and mentally fit yourself, you are not fit to help anyone else. Graduate students who teach serve many masters - their students, their disciplines, their departments, their community, and themselves. Learning to balance all of these demands is as much a part of your graduate education as your dissertation or thesis.