SEO or Adwords - Which is most useful?

[Ivor]

All advertising takes a lead in time and money. Initially your competition will click your ad, customers may not buy the first, second or even third month. They need time to gain trust and confidence in your site, this can be achieved by adding client testimonials.
SEO is the best long term investment, with Adwords you are only on page one whilst you have money. You need profiles on LinkedIn.com and any professional associations. Be active in related forums and blogs, you can gain keywords from there. Google takes your website trust from all your online accounts. Consider membership of "The Federation of Small Business" for networking.