I came across this in Nisargadatta Maharaj’s book I Am That, where somewhere around page 800 he recommends to a seeker who was having some trouble that they repeat internally the words ‘I am’ and follow where it’s resonance leads them. I thought it was interesting and worth a try.
After trying this a few times, it became a kind of centring exercise. I don’t feel that I am entirely done with it, but I am also not entirely sure I know what it does. Maybe you will have fun with it.