Below are two handouts from Loughborough University on working in teams. I've used these with students and know that there are some business teams that could benefit from them. Both have similar content, with the longer handout also being newer.
- Working in Groups (12 pages), http://www.lboro.ac.uk/service/ltd/campus/grpwork.pdf
- Working in Groups (4 pages), http://www.lboro.ac.uk/media/wwwlboroacuk/content/library/downloads/advicesheets/Working%20in%20groups.pdf
Finally, at a recent event, we were broken up into small groups and given the "marshmallow challenge." Below is the TED video about it and there is a web site with more details. This is an interesting engineering problem at which kindergarten students excel at (not adults). You might consider using the marshmallow challenge as a team building exercise, then use the video to debrief the group and start a conversation about what teams need to do in order to function well.