Safari launches, but will not load pages

Question

I've been running Snow Leopard since it came out, and Safari has been working fine, so I don't think this is an issue related to that.
Today it became terribly slow. Now when I launch it it gets stuck on trying to load my home page, or if I try launching a webpage from a URL in Mail, the URL will come up at the top of the window above the Navigation toolbar; i.e. above the URL field, but not in the URL field. In this latter case, the "Loading" does not even appear. In either case, I get the spinning color wheel. There's no way to clear the cache or history from within Safari, in the event that might be part of the problem (can these be done from the Finder?).
I ran Disk Utility. No problems with Permissions or the Disk.
What can I do to get it working again?

Answer 1

/Library/InputManagers has a folder Smart Crash Reports, last modified Nov 30, 2006. It doesn't let me trash it. There is no Home/Library/InputManagers.
I deleted:
LastSession.plist
History.plist
WebpageIcons.db
There was no Form Values.
Other items in the same folder which I didn't touch are:
Bookmarks.plist
data03a9.0bf
Downloads.plist
HistoryIndex.sk
Icons.db
LocalStorage [folder]
SearchProviders.plist.signed
I deleted Cookies.plist
In that same folder there's also these items that I didn't touch:
Cookies.plisttmp_1510.dat
Cookies.plisttmp_13600.dat
After doing this, Safari is still stuck trying to load my homepage.