1st paragraph should be an introduction of yourself and mention the position you are applying for. Tell them why you are interested and if you know someone that works for the company mention them here.
=============
cover letter sample (http://www.coverlettersthatkill.com)
There was a previous post on CV/Resume writing tips. Check the link below for details:
Tips for Creating Good Resume/ Curriculum Vitae (CV) (http://www.theinfostride.com/forum/index.php?topic=3977.0)