Redirect URL to Post Plugin
There are already plenty of plugins that can handle redirect rules for you. You can also play around with your .htaccess for more advanced rules. Redirect URL to Post is a handy plugin that can redirect your visitors to a random post, your first or lasts post, and a combination of those conditions.
This plugin gives a link that takes users to a post on your website. The URL remains the same but its target changes depending on the conditions you set. For instance, you can use this plugin to create a link for random posts on your website.
You can use various parameters to limit the # of posts considered. This plugin also supports caching.