adding dynamic keywords

[pornoTGB]

I am thinking about adding some dynamic keywords to my enter/warning page. I would update them once a day. Do you think this is a good idea? Will it actually get me a better ranking if the content of my page varies?
I know that I should put the same keyword into the page title, meta tags and body..

I also read about cloaking.. that would be very interesting but I think most of you think of it as unfair play..

thanks for advice and comments..