I'm spending today making sure that all my letters of recommendation are done. It's a hard job, actually. In the USA your letter has to reach Austenian levels of discursive display, and the one page job you get in the UK won't do the trick. It's nice to support my students. If you can't write an amazing letter, don't write one at all, is what I say.
By the way, you'll see that all the job advice is now aggregated on the “Jobs” page: click the tab above.