how do i insert a page break in to my webpage

I wish to break up the page for printing purposes, i have three or 4 parts on my page and without having to add a lot of blank lines I wish to allow them to click the print button and have it print each section on a seperate page.

how would i go about doing this ?

You could try this http://davidwalsh.name/css-page-breaks - haven't tried it myself but it looks right.