How do I apply a styling that affects only the homepage elements and not the single page? For instance, I want to add a border above and below a post container in the homepage but I don't the borders to appear in the singe post view. How do I do that?

you will need to add CSS Selectors and CSS rules to do the styling. You can prefix any selector with 'body.home' so to have a border around a post on the home page you would use

body.home .post {border: solid 2px red;}

A great tool to use if you don't already, is FireBug in FireFox so you can see the existing CSS for an element in the HTML

Thanks Juggledad. I do use FireBug but I was not aware of the body.home stuff. Thanks again.