A good technique:
Something called "a light touch."
Let's say I am at the grocery store in line. Behind me in line is a couple with a fussy baby. I noticed this. But also...I can act. I turn around and ask them if they would like to go ahead of me. I nod at their baby. The parents' faces break into smiles of relief. They look exhausted!
Mindfulness isn't only about noticing. It is about walking in the world lightly and spreading positivity lightly.
I say this because we don't want mindfulness to cause us to become self-absorped.
Practicing a "light tough" with ourselves and others is being mindfully compassionate. I read a lot about mindfulness online and sometimes I notice it is presented in a sort of rigid way. This is wrong. It should have a very relaxed feeling. Sometimes just to smile is mindfulness practice.
(I am a certified mindfulness instructor)