[russjhammond]

Not quite pure coding but I have certainly started dabbling with automator on my Mac. My favorite one so far is the special folder I setup on my desktop that automatically prints anything that gets dragged into it. This becomes very useful when you have more than one attachment to an email.

I would also recommend Hazel, which will automatically do some folder cleanup/maintenance for you based on a series of rules you setup.

Finally I use TextExpander religiously to never have to type the same email again.