Writing a report in Word 2007

[Arty]

Hi,



I'm am to write a report for my company and want to know how I should set it up so it works with numbered headings following each other and so I can make a numbered table of contents.

What I want to know is if I should write everything first and then do the set up or if I do set up as I write?

I am so frustrated with chapter numbers who don't follow in order, indents who move or doesn't move or just jump round...

Thank you!