Henrik Kniberg discusses the differences among different Agile processes such as Scrum, XP, and Kanban. He shares the thought that processes wars are meaningless and we need to see each process as a tool; there are no bad tools; just tools used for the wrong purpose.
http://www.infoq.com/interviews/agile-processes

Brian Spears shares his company’s adoption of extreme programming nine years ago and how his teams have evolved the process to suit their context. He shares the underlying keys to their success including management backing, the role and importance of a coach, and the eventual adaptation of XP with more experience. He also shares the non-XP practices and roles that evolved over the years.
http://www.infoq.com/presentations/extreme-programming-experiment

Extreme programming sounds a little too “ESPN2″ for most managers, but there is a lot of sound engineering behind its principles. I talk about the parts of XP that are absolutely vital and the ones that you can introduce a little more slowly (pair programming, only a 40 hour work week). I also talk about political battles with managers, other departments, and barriers that pop up anytime you try to introduce change in a large enterprise.
Watch this video on Oredev.org

With the three basic tools – pen, paper and a kitchen timer – The Pomodoro Technique will empower you with the agile abilities of Constant feedback about your working habits, Dedicated decision points to respond to change, Opportunities on a day to day basis to improve your personal process, A sustainable pace also when the deadline is getting closer, Improved quantitative and qualitative estimates, Strategy for how to cope with interruptions and task switching and a Method to regulate complexity. And The Pomodoro Technique fits perfectly inside Scrum and XP.

Willem van den Ende and Marc Evers introduce different cultural patterns you can find in software organizations, based on Gerald M. Weinberg’s work, and tell how to recognize them, what behavior to expect, and how you can handle unexpected events and change. They show how different agile processes like Scrum, XP, and Lean Software Development fit in, while explaining some common agile failure modes.
http://www.infoq.com/presentations/beyond-agile