This is an awesome tip.

if you have ever wanted to quickly email the link to a webpage to someone (i often mail links to my gmail account) its a bit of a drawn out process:
highlight the url, copy it, open mail.app, click create new mail, fill in a subject line and finally paste in the url.

there is a MUCH faster way.

since you are already on my site, just press

cmd + shift + i

a new mail message will appear with a pre filled out subject line and the url in the body.
all you need to do is to type in the recipient name.

:D