Not a post from me but a brilliant post on http://www.admixweb.com, not only do they suggest brilliant plugins that work straight away but help you to understand how to make your blog load up faster over time. Seeing as I use a self hosted blog it is always a challenge to make sure that the blog is showing up correctly on all the different devices as possible as well as making sure that people can access it as quickly as possible to maintain the hit rates, as we all know that a slow load up time can cause the public to give up and look elsewhere for the info they were searching for, a reader that might never come back.
If you have any more suggestions about speeding up a WordPress blog, post in the comments of either site.