I have just setup some 301 redirects in order to remove /development from the URL of my blog and wrote a handy piece of SQL to simplify 301 redirect WordPress blog htaccess. Once you have made the changes you can update your redirects /wp-admin/options-permalink.php. The reason I am redirecting to the guid which is the id based form is in case I change the slug in the future.
SELECT CONCAT('Redirect 301 ','/slugtoreplace/', post_name, ' ', guid) FROM wpdb.wp_posts WHERE post_type = 'post' AND post_status = 'publish';
You can then post the output from that script into your .htaccess file and everything will redirect properly.
Music to write this code to
Claude VonStroke’s Essential Mix minus all of the Pete Tong guff in all of its bass heavy glory always gets me at the command line.