I really enjoy using ACT’s metaphors—which take the client away from language-based thinking. Many of these metaphors are rooted in mindfulness practice. I often use the “quicksand” metaphor: as with our thoughts, the more you struggle, the faster you sink, so the key is to “open up” and “float” on top of the “quicksand.” Similarly, the “passengers on the bus” metaphor: that we all have “passengers” (trauma history, anxieties) that we must “drive around” with, but the key is allowing the passengers to be there while still driving toward value-based goals.
Another simple ACT technique that I love is putting the words “I’m having the thought” in front of our tough thoughts, as a way of detaching from the thought: “I’m having the thought that I’m stupid,” rather than, “I’m stupid.”
These are just a few. So many more that I love and use, too.