I just ran across Jordan Sissel's sysadvent project, where he posted one article about systems administration each day from the 1st of December to the 25th.
Jordan has been a great communicator when we've exchanged mail (he's the author of xdotool, which i maintain for debian). Unsurprisingly, his posts in sysadvent are also excellent. He has a broad knowledge of what tools are available, clever insights in how to connect them together, an engaging and clear writing style, and sharp sense of what really should matter to a systems administrator. Definitely worth reading!