Jay Nelson, author of the new “QuarkXPress for Dummies” book has posted ten Do’s and Dont’s for QuarkXPress.
These include useful tips & tricks, for example to use the built-in calculator and why not to scale images below a certain resolution.
Please see here for the complete post: http://www.dummies.com/software/other-software/10-dos-donts-using-quarkxpress/
Jay has written more blog posts about QuarkXPress there, all interesting reads. Enjoy!