Blogs

• http://blog.devopsguys.com/: Nice blog about DevOps
• http://www.kitchensoap.com/: Thoughts on capacity planning, web operations, and systems safety.
• http://www.agileweboperations.com/: Agile Web Development & Operations
• http://highscalability.com/: Various stuff about High scalability
• http://everythingsysadmin.com/: Blog about sysadmin stuff from the authors of "The Practice of System and Network Administration" and "Time Management for System Administrators"
• http://adamcaudill.com/: Software developer & architect, security researcher, technical elitist
• http://www.uwefenner.de/: Etiquette-Coach Uwe Fenner blogs & gives tips about correct behaviour and clothing ("Knigge") (German only)
• http://www.thecodelesscode.com/: A software engineer writes Zen-like koans about what he observes
• http://www.joelonsoftware.com/: Joel Spolsky's Blog where he is ranting about software development, management, business, and the Internet, he is also Co-Founder and CEO of StackExchange

Food, Body & Soul

• http://www.initiative-kao.de/: Critical site about organ donation in germany (related to german law system)
• http://www.chefkoch.de/: Recipes, and lots of it! (For english version, visit http://www.cooksunited.co.uk/)
• http://interfacelift.com/: Nice wallpapers can be found there
• http://deviantart.com/: Also nice site for wallpapers & pictures

Books I read and like

• The Phoenix Project: A Novel About IT, DevOps, and Helping Your Business Win by Gene Kim
• "The Architecture of Open Source Applications" (Volume 1 and 2) and "The Performance of Open Source Applications" are very good books that give you an in-depth understand of how certain software pieces work and why they were designed in that way. The later book focuses on the performance part. (Hint: All books can be read fully online for free on the website.)
• "Smart and Gets Things Done: Joel Spolsky's Concise Guide to Finding the Best Technical Talent" long title, but actually a good read if you want to hire "tech-people" for tech-positions. Focussed on developers but applies to sysadmin/other areas as well if adapted.

Funny stuff

• http://hanzismatter.blogspot.de/: THINK! Before you let yourself make a tattoo in a foreign language you don't know
• https://github.com/ChiperSoft/InterviewThis: InterviewThis: A nice compressive list of question. If you ask all of them in an interview you will definetly not being hired :-)
• http://thedailywtf.com/: What the f... stories from the IT-World
• http://securityreactions.tumblr.com/: Express daily security nightmares with funny .gif's :-)
• http://devopsreactions.tumblr.com/: The same like SecurityReactions, but for DevOps-People
• http://dbareactions.tumblr.com/: A database administrator (DBA) daily WTF-Moments expressed with nice pictures.
• https://twitter.com/BigDataBorat: Humoristic Twitter-account about being in and using BigData
• https://twitter.com/DEVOPS_BORAT: Quotes of wisdom from the greatest DevOps-Man alive: Borat. (Sadly he is inactive.)