Organic SEO – http://www.small-business-software.net/organic-seo.htm

Search Engine Tips – http://www.small-business-software.net/search-engine-tips.htm

How to Influence Search Engine Ranking – http://www.developer-resource.com/how-to-optimize-for-organic-search.htm

SEO Guide – http://www.developer-resource.com/search-engine-optimization-guide.htm

Spider Food – http://www.developer-resource.com/spider-food.htm

Free Web Marketing Tips – http://www.small-business-software.net/free-web-marketing.htm

Heavy SEO. And everything that encompasses like link building, proper web copy, meta tags, etc..

Affiliate-based marketing. It’s cheap, it’s legitimate, and it works. Plain and simple.

Pay-per-Click. Especially if the tour has high-ticket prices it can be well worth it to pay .80, $1 or $2 per click. If you couldn’t afford this then I would place “Link Building” in its own category here because it’s that vital.

BUT

Then you need defense which basically means tracking tools.
There are so many out there but you need to be able to track where people are coming from, what they’re clicking on, what content successfully leads to conversion etc. Google has a lot of free products.

Good Luck.
http://www.BusinessViking.com