I’ve seen people using LinkTrack in their email signatures, and it’s a pretty cool idea. Here’s a sample email signature that I use:

Full name
Company Name
999-999-9999
name@domain.com
http://mycompany.com

Note that if you click the mycompany.com link, it’s actually a LinkTrack link. That way you can get an idea of how many people are interested enough in what you do to check out your web site.