By finding things that are emotionally dear and significant to you, such as your possessions, job, status, family and then learning how to not give in to the mental anguish and suffering on account of the thoughts of losing those. (In order to be able to bear this, the precepts need to be thoroughly established). Observing feelings in your body postures cannot unfortunately do much for this, since such practices are all within a contrived microcosm created by the implicit sense of control. Hence, as you rightly point out, the inability to see it truly as anatta.

if i may help answering: that's the fruit of ur kamma (vipaka), if they bully u, they making new bad seed, if u're choosing to act out then u're making new seed too the logic is: stupid people are people with LACK of INT, when u can feel truly sorry (not emulating) for people of lack then u're developing metta.