Henrik Kniberg and his list of top 10 ways of screwing Scrum

The Agile methodologies of today hesitate to state that there are practices that work in every single environment but from my experience there is at least one that works in 99,999999% of cases :). It's called Team. As long as people work as a team and not as a group of individuals everything is possible and (nearly) every problem can be overcome. Just my 2 cents.
Watch this video to see Henrik talk in a compelling way about what you should avoid when you practice Scrum. Every second slide is accompanied by a real-life story which makes this 1,5h presentation fly in no time.