The top priority for a ScrumMaster should be to remove anything impeding his team to progress, in other words the impediments. In his article, Ilan Goldstein defines an impediment as “An event that impedes the ability of any of the team members to work to their estimated sprint capacity.”
The post starts with a list of possible impediments that includes ungroomed product backlog, absent product owner holding up key decisions or broken build. The most interesting part of the post is however the six step approach to deal with Scrum impediments ...