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:
- Different types of searching (by topic, author, substance, etc.)
- Refining & Analyzing your answer set
- Exporting your answers
- Linking to full text
- ...and more!
SciFinder Tutorials (Videos & Webcasts)
Covers many of the basics shown above, but in 7-15 minute videos (some longer).
See also: Synthetic Chemistry (see this 4-minute video)