a.k.a. Positives & Negatives
In the midpoint of a group, or as part of daily processing, it can be useful to get feedback on how things are going from the perspective of the participants.
Prompt the group for comments by raised hands, or by anonymous slips of paper to encourage more honesty. You may have the participants each write 6 comments: 3 pluses and 3 deltas (or things they'd like to see changed or improved). Then, read aloud to the group and discuss each statement as much as is necessary.
Start - Stop - Continue in which each person articulates what they would like to have "continue" happening in the group or for themselves that is currently happening, what things that they would like to see "stop" from occurring, and what they would like to see "start" to happen that haven't been occurring).