There is no end to the amount of information available on the internet to aid your genealogy research. Even if you knew that you had exhausted every source that's been posted as of right now, new information would be posted by tomorrow.
There are many ways to approach online research. One thing to remember as you reach for the keyboard is that online information is only as accurate as the historian who posted it. No transcribed document should be considered final proof of any fact. Use online research as a source finder, then follow up by obtaining a photocopy or registered copy of the original document. Then you will be sure that the information you have obtained is correct.
With that said, there are many ways to begin an internet search. One way is to type a person's name into your favorite search engine. Even relatives who lived two hundred years ago can pop up if someone else is also researching that name. Then, when you find other researches, you can begin your own network of sharing and assist each other when you uncover new information.
This sharing is one of the best tools found online. Many locality based web sites offer genealogical records or information dedicated to the memory of a historic monument, and will host query pages designed to allow researchers from all over the world to post questions.
Other types of sites include:
• Historical Society sites
• Genealogy Society sites
• Family Sites
• Sites dedicated to a particular war, such as the Civil War
• Sites about religious groups
• Sites dedicated to the memory of settlers of an area, and even
• Genealogy clearing house sites that list other genealogy sites
There are sites dedicated to the preservation of cemetery information, vital records, period clothing, and antiques. To gain a complete picture of your ancestors, you will need to know not just their names, and when they were born or when they died, but also how the lived.