System Administration Soft Skills: How can system administrators reduce stress and conflict in the workplace? by Christina Lear
Christina is a co-author of The Practice of System and Network Administration. The article is a great overview of the soft skills needed by system administrators and for non-sysadmins it is an interesting peek into sysadmin life. Check it out! (If you didn't recognize her name, that's because it changed when she married this guy.)
Handling HDD failures with Ganeti by Lance Albertson
Lance uses the Ganeti virtual cluster manager (think: VMWare ESX with Vmotion but completely open source) and has written another great post about how it is making his life easier. I work on the team that develops Ganeti.
Testable System Administration: Models of indeterminism are changing IT management. by Mark Burgess
Mark is the author of cfengine and explains the new thinking in system administration. If you've heard terms like "Configuration Management", "cfengine", "Puppet", or "Chef"(http://wiki.opscode.com/display/chef/Home) and weren't sure what they're about, this article will give you the theory behind it all.