How To Search - Free book from Wikibooks provides you with a quick reference guide for electronic information searching. It teaches you how to form accurate searches in electronic environments.
Anterion Easy Search - Experimental search tool. Enter your search query once, and search all major search engines, meta engines, video search, image search, blog search, and much more.
Google Guide - An online, interactive tutorial and reference for experienced users, novices, and everyone in between by Nancy Blachman.
The Spider's Apprentice - Helps you use web search engines and understand search engine technology. We rate, rank and analyze the popular Web search engines in clear, easy-to-understand language.
How To Search - A tutorial on World Wide Web searching and choosing the best search tools or engines to refine searches and get the documents you want.
The Essentials of Google Search - Tips to help you maximize the effectiveness of your search on Google. Choosing search terms, capitalization, exclusion of words, phrase searches, negative terms, and more.