Configuration query

["Thomas S. Dye" <tsd@tsdye.com>]

Aloha all,

This might be a naive query, but I'm wondering if there is some  
standard way to put the emacs configuration back to a previous state  
outside of the customization interface?

I'm finding that I frequently work with Org-mode files that need  
different configurations.  I typically have a #+begin_src emacs-lisp  
block in these files that I can execute with C-c C-c, so that emacs  
behaves the way the file requires for the task at hand.  When I'm  
done, though, and jump onto the next task, which might depend on my  
standard configuration to work correctly, I sometimes find that the  
changes I've made break things.  At this point, I typically save, quit  
emacs and start over.

What I'd like to do is be able to have, in each file that contains an  
emacs-lisp source block that changes the configuration, a  
corresponding source code block that puts things back the way they  
were before the block was executed.

Perhaps there is an easy way to do this?

All the best,
Tom