Today i recommend a plugin – Show Posts By Selective Category. This plugin will allow you to show specific number of posts from a selective category.
To use this plugin, you have to place a tag in the following format in your posts or pages:
To show a posts from category with ID b [pbc=a count=b] To show 100 posts from category with ID c
(Requires WordPress Version: 2.6.0 or higher)
1. Upload show_post_by_category.php to the /wp-content/plugins/ directory
2. Activate the plugin through the ‘Plugins’ menu in WordPress
3. Place [pbc=CategoryID count=num_of_categories] in your templates (without the quotes)
Use this plugin, you can easy seem random posts in everywhere you love, and it is really Random, because seem one category posts.