I'd eliminate any scripts you're not actively using and generally focus on reducing the size of the pages.

The home page "feels" very heavy — it takes a long time to load, and inspecting it via Google Chrome Developer tools there's several scripts which fail to load entirely. I'd challenge whether you absolutely need TinyMCE for example on your homepage, and any of the associated scripts.

A lot of the yahoo yieldmanager javascript (if it's needed at all) should be pushed into a separate cacheable file.

There's a mix of relative URLs and complete URLs, I'd strip out the repeated http://www.pe.com/ as much as possible.