I’ve recommended the ShopTalk podcast in the past, but hosts Dave Rupert and Chris Coyier touched on a pressing topic here for me: finding unused CSS selectors in your code. I didn’t realize until it was mentioned in the podcast that one great way to do so was to open up the Chrome web tools, click on the Audits tab and let it run. Scroll to the bottom where ‘remove unused CSS rules’ are listed. It’s far from perfect, but it’s a good starting point for trimming excess CSS.