Is there a way to retrieve those windows after a reset, or from the session before last? Basically, I had some useful windows open, but don't remember what they all were.
If you didn't select Clear History from Safari > Reset click History from the Safari menu bar.
See if the history trail is still available.
Nope, I got rid of all that and the cache, trying to speed safari up a bit. I guess I either forgot or thought that the windows that were open would be preserved if I then closed it.
Retrieving data ...