Column Shortcodes is a plugin that lets you divide your post or page content into columns wherever you want, using easy to use shortcodes.  You can swap in and out of various column layouts (there are eleven to choose from).

Once installed, the plugin adds an icon to your edit dashboard.  Click on the icon and choose a layout.  Enclose the content between the two parts of the automatically generated shortcode, and continue across the row.  If you choose, you can end the row with the “(last)” shortcode.

This is an easy way to create interesting layouts for your pages and posts.  The plugin also provides a way to add padding to columns.  Be sure to enter the padding first (put your cursor on the box, and add a pixel value for the padding) if you need it, and then select a column shortcode.