Calling various post types on the homepage

I've read a few posts that indicate that this is possible, but I'm still not entirely sure how to do this.

Rather than choosing between the columns display, wall display, and row display, I'd like to be able to employ a combination of more than one of them. Ideally, I'd like to display the column and rows alongside eachother down the page.

I saw in a previous post that the first thing to do is to remove the following code from home.php:

$contenttype = get_option('dev_buddydaily_latesttype');
if($contenttype == "rows"){
locate_template( array( '/library/components/content-rows.php' ), true );
elseif($contenttype == "column"){
locate_template( array( '/library/components/content-columns.php' ), true );
elseif($contenttype == "wall"){
locate_template( array( '/library/components/content-thewall.php' ), true );
locate_template( array( '/library/components/content-none.php' ), true );

After that, it seemed to make sense to me to create a new php file, where I would just copy code from the content-column and content-rows pages. When I did that though, I had no idea if I did it correctly and I wasn't sure where to go within my theme to see what that page was going to look like. Do I need to name this file content-columns.php to replace the existing template? Or am I missing something?