The site I’m building is starting to feel a bit sluggish. Is there any quick steps I can take to improve the performance?
I’ve input quite a bit of quick CSS. Can that be it?
The best way to optimize a WordPress site is to use a caching plugin such as WP Supercache or W3C cache.
The BWP minify plugin is a good one to look at as well, https://wordpress.org/plugins/bwp-minify/.
Also make sure that you optimize your images for the web.