Prior to WordPress 3.8, you had the option to select the number of columns you wanted on your admin dashboard. Personally, I prefer 2.
However, in version 3.8… that option is gone. Here’s a handy little code snippet to bring it back:
Just change all instances of “2″ to the number of columns you’d like your admin dashboard to have and drop the code into your theme’s functions.php file and you’re all set.