Here are some other tips:

• Put long, complicated graphics in the appendix. Use bite-size tables and charts in the text.
• Keep tables and charts as brief as possible.
• Signal the reader when a table or chart is coming up.
• Label graphics clearly and specifically.
• Number tables and charts consecutively throughout the report. Do not, however, mix the two.
• Use a graphic only if it will help the reader understand your point.
• Don't interrupt the text with a graphic; lead the reader into it and out of it.
• Point out the significance of the table or chart to the reader.
• Keep the graphic as simple as possible.
• Use white space and labeling to make your graphics attractive; make the reader want to look at them.
• Consider using tables and charts in the appendix as a way to compile and present all your significant data in convenient form.
• Usually both the title and caption are centered above the chart, but any consistently followed method will do.