Amazon CloudFront is one of the cheapest and best ways to boost your page speed times.
Your media files (images, files, etc) will be hosted on Amazon’s servers instead of yours. This saves bandwidth on your host. For example, when you receive too many hits on a large image, your host will have a surge of requests. This is especially bad when you’re on a cheaper shared hosting when you’re limited on how many requests you could have in a certain amount of time.