"There's not an easy way.
You'll just have to make sure when you upload images that you upload them in the correct size. The image of you in your sidebar is bigger than what's being displayed, so that's taking extra time to…"
"I plugged your site into http://gtmetrix.com and there a few other things that I would check into before worrying too much about combining CSS and JS files.
A huge win would be to right-size your images and install a caching plugin, or use a…"