Help! Mistakingly Changed My Blog URL

3 solutions to this without reinstalling your blog completely:

• Temporarily move/copy all of your wordpress files to your document root.
• If you have access to an .htaccess file, AllowOverwrite it is enabled, and mod_rewrite is enabled, add a temporary rewrite rule before any other you may have to point your base url “/” to your old url “/blog”.
• Edit your database in the “(your_prefix)_options” table (most of the time this is the “wp_options” table, the default). The 2 options to check go by the option_names of: siteurl and home

Please, always make a backup before editing your files and/or database like any of this 😉