[jQuery] Advice on managing multiple javascript includes

[jQuery] Advice on managing multiple javascript includes


I enjoy using JQuery on my projects and find that I frequently end up
including many javascript files in the header of my site's layout.
Obviously not all the javascript files are uses on every page.
I was doing some optimization work on my home page this morning and
noticed all the pages of unused code that were being downloaded. I'm
wondering if there was a way or system to better manage these
javascript files to prevent users from having to needlessly download
so much code.
Any advice? Does this even matter?
Thanks.