There are many websites available that can help you think through various parts of the writing process.  You'll want to experiment to see which work best for you.  And, these websites often have links to other places; make sure to follow these to find out further information.

If you are a writer for whom English is not your first language, you may be interested in: http://owl.english.purdue.edu/handouts/esl/eslstudent.html
For help getting started: http://www.powa.org/whtfrms.htm

For help with organization:

 http://www.powa.org/orgnfrms.htm

For help with revision: 

 http://www.powa.org/revifrms.htm

For help with sentence-level editing: 

 http://owl.english.purdue.edu/handouts/grammar/index.html
and http://www.powa.org/editfrms.htm
For help with quoting and paraphrasing sources: http://www.wisc.edu/writing/Handbook/QuoSuccessfulSummary.html
and http://www.indiana.edu/~wts/wts/plagiarism.html
For guidelines on documenting in MLA style: http://www.indiana.edu/~wts/wts/citing.html
For guidelines on documenting online sources: see http://www.mla.org/ and go to "Frequently Asked Questions"
http://www.uvm.edu/~ncrane/estyles/mla.html
For information on how to search the world wide web; http://owl.english.purdue.edu/internet/search/index.html
 
EMU First-Year Writing Program, 2003-2004.