I make an effort to not say "I am X" but "I prefer X". I think it helps me automate decisions as pointed out above (I just have coffee in the morn) but does not make it sound or feel like any weighty major life decision, and therefore might make me feel slightly less predetermined (on occasion I might prefer tea!). Similarly, a younger me considered myself smart, now I prefer to think of myself as someone who is pretty good at using logic. Being able to say: "you can too!" seems more productive than saying "you're dumb and just don't get it". It has also lead to succesfully questioning some of my own preconceptions (why would I exclude myself from logical analysis?), while being criticized for 'being smart(ass)' feels more like an attack.