Here are my quick-action no-nonsense tips to speed up your wordpress site - RIGHT NOW. It's how I go my own site's page speed score from 65 to ~ 91.
Earlier this month I found this great plugin for Wordpress that lets me show all my social updates across a variety of networks on a single page on my website. Give it a try yourself!
From my experience, I have put together this list of crucial things you MUST do before changing your site theme. These pointers will hopefully save you a lot of time and regret.