Start out with an outline somthing like this. (Move around the sequence if you want, this is just to give you the basic idea)
1. Yourself.
A. Interests
B.Asperations
2. Qualifications
A. Schooling
B. Certification
C. Other (Letters of recomendation that sort of thing
3. Past work experience
A. Experience relivent to desired job
B. Non Relivent experence
Then just go through and jot down what you are going to put under each group, then expand each point so you get a few paragraphs out of each number. After that just go through and brush it up so it reads easily and not like a checklist

Hope that helps