css, javascript and optimization

This isn't a plugin question but I didn't know where else to ask it. Basically, I am wondering whether I should make my css and js inline or make it an external file? I've been having server load spikes lately, usually when the site gets a lot of traffic. They seem to be related to mysql queries, but I'm not sure. When this happens, pages are taking 10-30 seconds to load, and occasionally people get a timeout error.

So I'm trying to optimize the site, particularly I'd like to reduce mysql queries. I'm assuming that when you make your js and css inline, that this adds two more mysql queries for each page load. Is this correct? And by making it an external file, it does not need to query the database.

I would appreciate anyone's expertise on this issue, aside from my basic question above. Here's the site, if you are interested in seeing it.

http://www.popularresistance.org

Thanks!
Emanuel