Here's a quick and easy technique for excluding certain types of content in your site search by appending the search form action URL. When creating a site search in BC, you have the option only searching through a specific content type, but there is no way to exclude certain content types. This solves that problem.
**Note: If you're noticing that certain recently created pages or items aren't showing up in your search when they should be, you may need to re-index your site. This can be done by going to Site Manager > Site Search and clicking Re-Index Site.