I’m interested in everyday applications like noticing bias in commercial media as well as word-of-mouth and social media. Are there any principles or methods you know of that you’d consider especially important?

I’m also interested in any recommendations for online training.

Edit: Wow! Since there are some great suggestions in the comments, I'd like to summarise them here:

• Primary sources and secondary sources (fefellama)
• Engagement (BeanBurrito)
• Under The Influence by Terry O'Reilly [podcast] (chocobean)
• Influence, marketing, motivation, bias, dark patterns, corruption, phrasing and choice of words (chocobean)
• Multiple sources. Verbalise your thought process / question yourself (hobofarmer)
• Advanced Placement English. Ethos, pathos, logos (Wisix)
• Learning how to hold and study concepts without internalizing them. Not becoming emotionally dependent on “being right”. (bet)
• Flaws in perception and processing. The Scout Mindset by Julia Galef: "the motivation to see things as they are, not as you wish they were" (Landhund)
• Fact checking, exercises such as mock trials (chizcurl)
• Not assuming that critical thinking transfers across domains (daywalker)
• Falsifiability, scientific psychology, psychological bias, cognition / emotion / behaviour (daywalker)
• 'Very Short Introductions' series by Oxford Press (daywalker)
• Many ways to conceptualise "critical thinking". Appreciating the humanity of other people. (mieum)
• Self reflection and acknowledgement of diversity (mieum)
• The Unpersuadables: Adventures with the Enemies of Science [book] (gaywallet)
• Being Wrong: Adventures on the Margin of Error [book] (boxer_dogs_dance)
• Be curious and ask questions (Markpelly)
• Empathy facilitates understanding and tempers reactivity (Aerrol)
• Nobel disease or Nobelitis (saturnV)

I am not really someone who is well-versed in history, I never paid attention in high school, I couldn't wait to GTFO. I know what I know based solely on podcasts/debates/lectures I find on YouTube and what Hollywood brings to my attention.

from my own knowledge, periods of social change (at least in North America):

• the civil rights movement
• women's suffrage movement
• civil war (given it was fought to a great deal to end slavery)

when it comes to social changes in history that is not based in North America, I know of only the broad strokes and none of the specifics, like I know the arrival of the printing press lead to a great deal of struggle in the same way that the arrival of social media has created a struggle, just the balance of power has changed.

I also know that France went through a French Revolution that played a big part of its current political landscape and its secular status quo.

However, something I have found interesting is that within the span of <10 years, we are experiencing a reckoning on several different fronts:

• MeToo movement have rise to a long-needed discussion of sexual harassment and just a general gender reckoning in other ways too
• the murder of George Floyd and subsequent protests gave rise to a global awareness that race-related issues
• the Hamas attack on Israel has certainly pushed the discussion of Israel-Palestine to the forefront. Before the attack, I could not tell you the difference between Erdoğan and Netanyahu. That's obviously no longer the case.

But it makes me wonder if this is unprecedented in human history that so many different issues of social change are being pushed to the forefront in very quick succession of each other or this is a repeat, that it's common for a civilization that experiences one changing in the social norm, to start experiencing other social changes cause they are always in the mindset or something?

I've found error theory, emotivism, etc. quite compelling, but I noticed that most philosophers are moral realists, though PhilPapers doesn't ask specifically about moral objectivism. As a non-philosopher, I feel that there may be considerations that I haven't come across. The SEP entry seems a bit lacking to me considering it's just a supplement to the entry on moral anti-realism, and there doesn't seem to be an IEP entry specifically focused on moral objectivism, just a tiny section in the entry on moral realism.

I don't follow politics anymore.

I wasn't always like this. I used to be a good liberal; I went to demonstrations, paid close attention to every SCOTUS decision, kept up with everything that went to shit during the first Trump presidency, etc. I wrote my representative about things that still needed to be undone. I would feel anxious regarding the state of the future. I followed the day-to-day of the Mueller investigation. I joined a small group that read political theory and philosophy. I'd try eagerly to defend my values to friends, family, and coworkers. I wanted to do my part to make this world a better place!

I learned about historical materialism, and this tracked with me in a way liberal idealism never did. The US isn't this pinnacle, this culmination of moral progress humanity achieved, but like every society that came before it a small ruling class that exploits a larger group. Liberal democracy itself is a product of changing material conditions. And like every other exploited class before me, I held to the ideology of my society (liberalism) and I believed my exploitation was just. I used to dismiss this framing as hippie nonsense, but it turns out this is a bedrock for much current sociology. Slowly, this plus Trump plus COVID broke me from trying to reason with conservatives or care about changing minds.

I don't know what the solution to anything is. I doubt that materialism is true, though I still think the framing is useful. I still vote, but as a basic bit of harm reduction. I no longer feel invested in seeing the US succeed as a bastion of liberal democracy. I have no pride in liberal accomplishments and feel no surprise in reactionary successes. I don't care that Trump was indicted. I wasn't shocked that Roe was overturn. I can't do anything about the Chevron decision. I would've lost it a few years ago, but today I just don't care. That's probably what conservatives want, and I don't care about that either.

Instead of following politics or reading theory, I read whatever philosophy I want. Instead of keeping up with debates, I focus on my hobbies and hanging out with friends. My apathy isn't due to being unaffected by modern politics, it very much is, but I've accepted my lot in life, the way I assume everyone of every society preceding mine has done. I feel liberated from a struggle I rarely if ever got to be a participant in. And, you know what, I'm accomplishing just about as much as I was before. I didn't realize it, but I've been checked out for a long time now, and I wonder if others feel the same.