Make notes as you read the paper:
Many people cover the margins of their copies of papers with notes. Use whatever style you prefer. If
you have questions or criticisms, write them down so you do not forget them. Underline key points the
authors make. Mark the data that is most important or that appears questionable. Such efforts help the
first time you read a paper and pay big dividends when you have to re-read a paper after several months.