Scott you have a lot of good questions but they require conveying a body of knowledge exceeding what makes sense to post. Here's a couple books that make great entry-level to intermediate texts:
http://www.amazon.com/Chassis-Engine...dp/1557880557/ (my favorite)
http://www.amazon.com/How-Make-Your-...our+car+handle
From them, you can gain an understanding of the pros and cons of stiffer vs. softer spring rates and sway bars...
As for how to increase front ride frequency - the easy way is to up spring rate.