First off, do what incrediblehelp says.

Second, trim the title of your site. Don't try going for it all at one shot. Try to become an authority on one keyphrase, such as Sexy Clubwear, and work from there.

Seperate Each of the Categories you want to rank for into their own sections of your website. Work on your SERP for your top choice, the others will either come in before or after.

Best of luck, keep at it.

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