A draft section from my forthcoming book, The Friendly Internet Handbook. Lots of work to do still...
You can find many different types of information through the Internet. The list is nearly endless, but here are few prominent examples. You can find very specific information on a very specialized issue. You can find general introductory type information on a broad topic. You can find phone numbers, maps and driving directions. And, importantly and often forgotten, you can find many people who can provide you desired information.
No one search engine can provide you the best results for every search you conduct. Google might come the closest to being one stop searching, if you are in a pinch.
I believe, however. it pays to learn which search engine is the best for whatever it is you are looking for.
Specific Information - Google is best used when you are looking for very specific kinds of information. Google offers a whole range of other features, but it is probably it at its best when it can really focus. More on how to help Google focus on the pages to follow.
Broad Topic Information - The Yahoo Directory (directory.yahoo.com)- notice how I say the Yahoo Directory, and not simply Yahoo. The Yahoo directory is Yahoo's comprehensive database of handpicked web sites. It is best used for general information on a broad. preferably non commercial, topic. Businesses (?and organizations?) can pay for a fastracked review by Yahoo directory editors. Although Yahoo policy states that paying for a quicker review absolutely does not guarantee inclusion in the directory, I am always a little wary of commercial web sites I find there.
Telephone Numbers - for listed numbers all over the world, it is best to go to an online phone directory for the country in which the number is located. In Canada, online phone directories include Superpages.ca and canada411.com. In the US, anywho.com and superpages.com.
Maps and Driving Directions - Major search engines offer popular features that allow people to view interactive maps of a certain area and/or to get driving directions from one place to another. Popular sites include Google Maps (maps.google.com), Yahoo Maps (maps.yahoo.com), and MSN Maps (maps.msn.com). Another good service, with better worldwide coverage, is mapquest (mapquest.com).
Reference Information - For encyclopedia type entries, I recommend either going to the MSN Search(msn.com) and clicking on the ENCARTA link on top of the search field or visiting Wikipedia (wikipedia.org). Wikipedia is a very interesting web site in that all the entries are written and forever editable but the site visitors. Through Wikipedia, you can contribute some of your knowledge to the world - more on Wikipedia later. I would trust wikipedia for higher profile entries, and be a little more cautious about more obscure information. I also like a site called Refdesk (refdesk.com) which has a huge amount of reference links, but beware, Refdesk also has a lot of advertising (including often the dreaded pop up variety) and clutters a lot of info on its front page.
Human Experts - I often tell people in my seminars that, if all else fails in your Internet searches, the secret weapons I have to offer are Expert sites. These are web sites where instead of searching for information directly, you can look for human beings who may be able to give you the answers you want. Each of the experts are rated by previous questioners, so you will want to find people who have high and recent ratings. Allexperts.com is a free site where I have had a lot of luck. Google (answers.google.com) offers a for pay experts / research service where you can set your own price. If these fail, which happens rarely, you might considering browsing through the faculties of various universities to see if you might find a friendly professor who can help.