My only real tip, based on real life experience, is to not pad your CV with skills you clearly don't have. If you write that you're "experienced in Linux", but

My only real tip, based on real life experience, is to not pad your CV with skills you clearly don't have. If you write that you're "experienced in Linux", but can't name one distro you've used, or perform the simplest task - then that's very telling, and instantly makes one doubt the other points you've listed. Only list the things that you're comfortable with discussing in some detail, on the spot, if needed. (FWIW, I did just that early in job search, straight out of college. Listed some programming language that I'd read one or two tutorials on, and guess what - suddenly one of the managers interviewing me cuts in, and starts asking me a bunch of questions about my work with said language, and if I could work him through some code)