Only certain categories for main page.

Assuming the ‘site updates’ category ID is 7, and if you are using the WordPress Default Theme, you would just change the wp-content/themes/default/index.php:

from:

<?php if (have_posts()) : ?>

to

<?php
query_posts($query_string . '&cat=-7);
if (have_posts()) : ?>

Also the Custom Query String Reloaded and the
Advanced Category Excluder plugins could do this.

Thanks for the help. I had actually tried the advanced category excluder plugin before i posted this but couldn’t really see what it was supposed to do for me once I had activated it but I am a newbie with wordpress.

Having actually tried your code now there are a small change that should be made.

It should actually be query_posts($query_string . '&cat=7');

The difference being that using the minus sign in front of the 7 actually removes that category from showing, eliminating the minus sign causes this code to do exactly what I wanted it to and only show that category. Just wanted to post this in case someone else searches for the same issue.

Thank you again, you’ve helped confirm in my mind that I will in fact be signing off of blogger.

You will want to understand the Template Hierarchy and Category Templates if you are going to be customizing things to any extent. Also review WordPress Semantics.

https://www.ads-software.com/extend/plugins/advanced-category-excluder/