• Try the obvious first.
• Use words likely to appear on a site with the information you want.
• Make keywords as specific as possible.

• Make sure that you spell your question correctly.
• Keep your search phrase simple.
• Only ask one question at a time.

• Specify words that should not appear in the results. Attach a - in front of words that must not appear in result documents.
• Use quotation marks around words that are part of a phrase.
• Specify words that must appear in the results. Attach a + in front words that must appear in result documents.