It's taken me almost two years to find some great links that helped me with my writing - thought I might share a few:
http://www.easybib.com/ submitting a bibliography for a magazine article you wrote? Has it been a few years since you were in high school? Check out this website, type in your information and voila! Easy bib can format online sources, newspapers, email interviews, you name it! Things have sure changed since I was last writing bibliographies.
http://www.rhymezone.com/ writing a book in verse? Can't think of a word that rhymes with "amazing"? Type in your word and rhyme zone will give you rhyming words - even offering you syllable choices. Maybe it's a dictionary you need or a thesauras - get it here. As a writer who often finds herself writing in verse, this site has saved me hours of frustration.
http://www.amazon.com/ You have a great idea or a terrific title, but wait a minute....are there similar books already on the market? The Amazon site can tell you. Some of the books even offer text stats such as word count, etc.
http://www.institutechildrenslit.com/ The Institute of Children's Literature offers great tips online and also a newsletter. The RX for Writers is free. Archived interviews and articles are also available.
http://www.underdown.org/ Harold Underdown is an editor who offers a terrific website for aspiring authors. He has recently published the third edition of An Idiot's Guide to Publishing. Also good tips on choosing a reputable agent.
http://www.scbwi.org/ The SCBWI bears mentioning again. A great organization of writers (published and aspiring). The website is a valuable tool and the workshops offer a writer the best chance of meeting an editor.