Anti-"this one time I heard about this one person so this completely proves..." arguments.

Anti-black and white thinking.

Anti-confirmation bias.

Anti-homophobia, Islamophobia, transphobia, etc.

Anti-dehumanization.

Anti-the end being the end

Anti-adversarial relationships and challenging the ever-present challengers.

Anti-coupling of just-world thinking with "life's not fair" cliches. Make life fair.

Anti-reducing society to compartments and hierarchies.

Anti-moving of goalposts.

Anti-unreal thinking.

Challenging being a bystander and anti-bystander statuses, whether it's interpersonal things like bullying or injustice on a greater scale.

Anti-inaction and neglect.

Anti-scapegoating.

Anti-illusion of one thinking they are making rational decisions when they are not.

Anti-latent aggressive acts of being in the way of someone else and possibly harming their interests or even endangering them. A key to seeing this is if you find yourself saying "NOT HELPING!" to someone or something else when you did not expect harm from that person, much less actual help. May or may not involve the harming party saying that they want to help the party about to be hurt.