Firstly read the http://www.seomoz.org/beginners-guide-to-seo.
Step 1- Change your Title Tag: e.g Sknlisting | StKitts Real Estate.... Your current one is to long:
St Kitts and Nevis Real Estate Listings | Find st kitts and nevis real estate, houses for sale, houses for rent, apartments for rent in st kitts and nevis,
Step 2- Submit to quality business / Link Directories. e.g. DMOZ, Yahoo, BOTW http://www.seomoz.org/directories
Step 3- Keyword competitor link research - Use http://www.opensiteexplorer.org
Research your competitors links, then create an excel spread sheet and attempted to get their best links
Step 4 - Press Release - Press Release to relevant Newspapers, Magazines & PR web (or similar)
**Step 5 - Start a blog and create useful content **
Step 6 - Use Social Media to promote your blog and website.