We do different mindfulness exercises in my DBT group... we spend two minutes on each, but you could easily spend three or however many you wanted to. Sometimes we do mindful breathing, which is just noticing your breath and when your thoughts try to float away, redirecting them to your breath. Another one is noticing things in your environment related to the 5 senses, just noticing and not judging and one sense at a time. We have done one where you sit in a way that in uncomfortable (like with your legs straight out) and just notice the sensation. Another one is describing and noticing an item (a rock, a leaf, a pine cone) and being nonjudgmental towards it. We've done guided muscles relaxation (there are some good one's on itunes). I hope at least one of these tickles your fancy!