As a graduate student there are many pressing demands. For myself, I have found it helpful to block time in 2 hour blocks, dividing activities related to research, classes, and personal time. I strongly suggest taking 1 day out of 7 days as rest. Here is the form that I have printed out and use to organize my time and semester, writing special meetings in red and other things using black ink. After you have understood the items in this sheet (using your mouse to point and click over objects will give you and explanation of each item), you may download a copy for your use. Here is a link to [A blank schedule] to help you.