My advise is always the same. Open a Wikipedia account (Wiki Commons if you are going to upload pictures) and read my entire blog. Then pick something that interests you and get started. Ask for feedback if you feel you need it. Then comment here on the blog letting us know what your working on.
Ben Radford and I are on the same mindset of a page that badly needs help. Psychic Detectives (in my opinion the lowest of the woo people). I remember reading an article in SI ages ago about the best evidence for a actual "solved" case using psychics. I didn't know (at that time) any of the parties concerned, but some time has passed and I'm familiar with all the players now. The investigator of that article was Ben.
At TAM9 at the CFI table they were giving away free copies of SI, one issue was this one from March/April 2010. I snagged it and kept trying to read it at the IIG table when I wasn't talking to people. I never got more than a couple sentences into the article when I had to put it back down. To make a long story short (too late) I did not come home with that issue, nor can I find the one I had at home and it isn't on-line.
So I'm asking for help. I can't update this site without having access to articles. That issue was totally awesome with references to Sylvia Browne and the "best case for psychic detectives" in it.
When you look at the psychic detective page you will see how pathetic it actually is. Badly sourced for something that we could easily fix. It does not generate a lot of hits (only 493 in June 2011) but we don't know who these people are, they might be total believers or maybe fence sitters accessing this page. It does not matter, this page is in the public's eye and needs attention.
Besides, once the blurbs are written for this page, we can take the citations and blurbs and leave them on all the mentioned psychic pages. Sylvia Browne included. Spread the knowledge.