The Chemical Abstract Service (CAS), producer of SciFinder, provides many training and troubleshooting guides on their website. Choose the format that works best for you! How-To Guides (PDF Format) and more.
Quick overviews of basic functionality including:
Covers many of the basics shown above, but in 7-15 minute videos (some longer).
See also: Synthetic Chemistry (see this 4-minute video)
Tips from the Experts - Article by A. Ben Wagner published inIssues in Science & Technology Libraries regarding search strategies for salts, alloys, and other inorganic compounds (with the exception of organometallics.)