SSL is a fact of life for virtually every web developer, and crucial if like me you work on ecommerce projects on a daily basis. Of course we all have an SSL cert on our development and staging servers, along with production, but what about your localhost machine? Wouldn't it be good if that was running SSL as well? And so you can:

Tip/Trick: Enabling SSL on IIS 7.0 Using Self-Signed Certificates

This came up for me because a) I was dealing with a problem that was only evidenced under SSL; and b) because I recently had to do a clean Windows install I'd lost my previous self-signed certificate in IIS7.