Let me introduce you to a friend of mine:

The OWL at Purdue
http://owl.english.purdue.edu/owl/

I've been using the OWL for many years now and trust it completely. Herein lay rules of grammar and citation. Make use of the site. We aren't going to actually cover much of the vital information housed conveniently on the website.
If I note your comma's are spliced, visit : http://owl.english.purdue.edu/owl/resource/607/02/

And so on.

Now you have no excuses.