Duplicate content

Just a quickie before I may finally go to bed. I took some unique text on one of the worst hit pages, and searched for it in Google. 3 results, all with word for word match. All on my site. Damn it!! One is a sort by price version of the same original page. So I'm adding Disallow: /*sort= to robots.txt thanks to this tip here. Hopefully that will get rid of one duplication. The other is me being lazy, taking unique content from one page and mashing it up on the category page. Idiot! Am changing it now. Its the same on other pages too - lots of writing for me to do tomorrow!