There are lots of products out there. Here are some I’ve used and I think are superior:
Mac OS X: The Missing Manual by David Pogue — Easy to understand introduction and explanation of how to use Mac OS X. I recommend it to all of my clients.
Fix Your Own Printer — Printer parts and step by step repair videos. Saved me hundreds of dollars.
PBWiki — Simple, secure, online space for organizing your information.
Brick-and-Mortar Stores (in the greater Rochester NY area)
Metro Cartridge — Printer toner or ink, great products, great prices, great service. Local to Rochester, NY
Small Dog Electronics — Knowledgable staff, great service, fast shipping.
Pair.com — Great hosting provider for your website, large or small.
GoDaddy.com — Fast and easy domain registration, with the lowest fees I’ve seen to date.