Use a straight edge for the axes of graphs and tables. Do not attempt to draw graphs free-hand. Title each graph and table. Label axes clearly with units. If two or more curves are drawn on one graph, label each clearly and with different symbols such as dots, dashes, etc.
All data have units.
Do not forget to record the units for each data set collected and for all calculations. All notes, data, and answers must be legible, and arranged in a neat and organized fashion so that your colleagues can understand your results. Never remove pages from your notebook, or erase any data. If you have made a mistake, simply cross that information out and start again. You may find that you need it later.