1/ Unpopular academic opinion:
You don't fix your own imposter syndrome.
It's not a matter of thinking the right thoughts to yourself, and all these panel discussions on "dealing with imposter syndrome" are, at best, a waste of students' time.

2/ Imposter syndrome is about feeling like you don't belong, but you can't think yourself into belonging.

That takes two things:
(i) Friendship and acceptance in a professional community, and
(ii) Real, one-on-one mentorship

3/ Real mentoring involves a person who has "made it" getting to know a person who is still trying to "make it", at a deep level.

This knowledge enable the mentor to say, in a meaningful way: "I see your strengths, and they bring something valuable to the table. ...

4/
... I also see your weaknesses, and they are acceptable."

Without getting that message from peers or from a senior mentor, how can a person possibly "get over" their imposter syndrome?

5/5
So much bullshit is produced when faculty members say, essentially, "our students are feeling bad about themselves, and we must do something. But we're not going to invest the time/energy to give them one-on-one mentorship."

(I will admit that this thread is partially a subtweet of myself)