Using the Internet is certainly a great way to find help on Linux tasks. In many cases, it may even be better than relying on local sources as updates may have occurred since the documentation was last put on your system. When I need to look up something using the web, I go directly to Google Advanced Search.
The following is a screenshot of http://www.google.com/advanced_search with some of the fields already filled in:
Using this search method is fast and you can use those fields to narrow down what you are looking for.
Keep in mind that there is a lot of information out on the Internet. Some of it is accurate and is exactly what you are looking for. However, in many cases the information is not correct. The person giving the answer may act as though he or she is an expert on the subject when in fact, he or she is not. Many people also don't always check their solution before presenting it as a definitive answer to your question/problem. Be aware of this as you try solutions given on the Internet.
The reverse of this situation is also true. If you want to help people, then that is absolutely great. However, be considerate and test any solution you wish to provide for accuracy before sending it as a reply to their problem.