Hey there Gobbles1981! Welcome to Sitepoint and congrats on your purchase of that kit. That was one of the first things I bought when getting started in design years ago and it's a tremendous resource to have.
With most marketing related activities I usually believe that you never know what works best until you test something and see how it works for you, but when it comes to prospecting, I think email would be the last thing I'd recommend to anyone.
While it's cheap and easy to send and track results, it's also easy for prospects to ignore or mark as spam. Even if it's technically legal to send where you're doing business, I'd prefer to avoid a prospect thinking of me as a spammer or getting me in hot water with my ISP for sending unsolicited email.
Honestly, I think it's kind of funny that many web designers who are looking to make a thousand bucks or more on a project aren't willing to invest a a dime in some decent marketing. :eek:
When it comes to marketing any business you need to stand out from the competition and be noticed and I think you stand a much better chance of doing that with a direct mail piece instead of an email. Even better is a letter followed up with a phone call, or send something in a box, tube or via FedEx if you really want to be noticed and at least get your message read.
Keep in mind though that with direct mail your mailing list is more important that even the offer you're making - and a bad offer sent to the right list will almost always outperform a great offer sent to the wrong list.
P.S. I forget which chapter it's in, but one of the better marketing ideas in the kit it about partnering up with local businesses who also deal with your ideal client and paying them a commission for any work sent your way.
P.P.S. While I'm against emailing to prospect for new business, I do think it's a wonderful way to market to clients and prospects who have asked to hear from you and receive a newsletter on a regular basis.