I feel like a total cop out leaving it at that, but I have bookmarked Maria Giovanna's excellent tips, and I solemnly swear to do this Thing properly next summer before I start applying to professional posts.
Here are a few blog posts I've bookmarked in the past because they have handy application and interview tips:
Laura Wilkinson, Tips for applying for library jobs
Becky Woods, Application, application, application
Katy Wrathall, Gizza job - from both sides of the desk
Ned Potter, What's the key to a good interview - beyond the usual trueisms we all know already?
And here's a blog post that I wrote last year about practical tasks in interviews. (Includes a crowdsourced list!)
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