So - armed with an hours worth of time, I set out to fix my own website while recording my progress. I'm far from a performance specialist, but hopefully this shows you that making your sites fast is a relatively simple task that can pay off huge for your users.
I mention a few WordPress/Apache specific things in this video, but the tips should apply to any site/server config.
Find an issue with this post? Think you could clarify, update or add something?
All my posts are available to edit on Github. Any fix, little or small, is appreciated!