Like most humans, I find this difficult. If you don't, you might check on Dunning-Kruger.
I especially agree with the idea of self-identifying as a truth-seeker rather than as conservative, progressive, libertarian, climate hawk/sceptic etc. Still doesn't make it easy though.
And just to balance out the reasonable video with a vitriolic one about sports:
UPDATE: a previous post on persuasion that I forgot about, referring to Kevin Drum:
My own experience, which I think is fairly generalizable, is that within the course of a single conversation hardly anybody ever changes their mind — including me.
He says he changes his opinion over time, though. What works for me is new information. Even if I'm not persuaded originally, new info might convince me - but maybe not so much because it's new but because it's a crutch, an excuse that lets me shed my stupid original opinion. Anyway, good for Kevin for reacting to Libya.