well i would say the NUMBER 1 thing to get visitors is follow the guidelines of Google Seo urls of 2009.

A good URL will always get indexed so if you got
for example : http : www . mydomainname . com

your talking about horses

it should be :
http : www . mydomainname . com / horses
(this is a perfect url in the eyes of google)

rather then :
http : www . mydomainname . com/ 123&pid ...
(that is a ugly URL )

Not only will it be better but you will see a magnificant differance see more on your rating and better chances on reaching a higher rank then being below 10,000 websites ...

Remember tags are not nessary these days as people over the years have abused the system so now they are indexing under the SEO of Gooogle alot more these days ...

this is mentioned all over on the NET.