chalst: There's the standard rule to avoid click here as link text, but you seem to have got that one already ;-) The best page on the W3 site about link text I could find isn't that long either, though it does link to Tim Berners-Lee's style guide from 1995, in particular the page on avoiding talking about mechanics. I think the most important point they make is to avoid verb phrases - links should be as noun-ish as possible. Also IMHO cutting down on the glue words is a good idea.
Some thoughts about online authentication to follow sometime when it's not 2:13am and I don't have a bunch of things I should have done on the weekend to do today when I get up. However, I will just say that the remix of London Still (The Waifs) was an act of vandalism that converted a great song into something that made me want to stab my eardrums.