Advice

Question extreme opinions. Few things in life are black or white.
Controversial topics have no easy answer. They are controversial for a reason.
Don't lament losing a debate. You just learned something new.
Many conspiracy theories are true. Mocking the term is not wise.
You do not need to have an opinion on everything. It's okay to say "I don't know."
All political sides have something worthwhile to teach.
You can like or dislike a belief, but accept that won't make it any more or less true.
Listen to people with extreme opinions. They help expand your horizons.
Almost no beliefs exist in a vacuum. Most draw from many fields of knowledge.

The fact many people believe something doesn't make it any more true.
Different people have different religious beliefs for a reason. Consider why that may be.
Full-fledged atheism demands as much faith as extreme religiousness.

Meditate, if you can.
Wake up early, even if you don't need to.
Make sure sunlight can enter your room in the morning. It will help your circadian rythm.
Don't snooze your alarm. You'll only teach yourself to ignore it.
Avoid any oil that isn't coconut or olive oil. Butter is a good replacement.
At least 50% of the planet has vitamin D insufficiency.[1] Find out if you do.
Get a plant. Care for it. Keep it in a spot you look at often.
Intermittent fasting is healthier and more efficient than caloric restriction for weight loss.
Being a vegetarian/vegan will tax your body unless you learn nutrition in detail.
Get a pet. Care for it.
Don't take painkillers unless you can't take the pain. You will find you don't really need them.
If you feel unwell, eat a mint and tell yourself it's a panacea. Placebo effect might help.
Avoid shaving against the grain.

A true, close friend is priceless.
Studies show most people enjoy sex that is around 10 minutes long on average. Keep it in mind.

Ask yourself if you are happy with your life. Think carefully.
Try new things even if you don't want to or think you'll suck. Manga, guitar, sudoku, painting.
To better remember dreams, keep a dream journal. Write on it as soon as you wake up.
Assuming you're of average intelligence, remember half of all humans are less intelligent than you.
Avoid games which encourage lootboxes and microtransactions.
Never preorder anything. Cultivate patience. It will pay off.
Record media of rare moments, especially ones that will become rare soon (e.g. child growing up).
Keep track of movies, shows, music you've watched/listened to in your lifetime.
Radical and foolish ideas tend to get more exposure due being controversial, not because they have more support.
All groups have their ideals twisted once they surpass a critical mass of users.
Free time doesn't need to mean idle time. Laziness is optional.
It's okay to drop books/series/movies midway. Don't force yourself to finish them.
If you can't explain the gist of something to a child, you likely don't fully understand it. And that's okay.
Perfume goes at the base of the throat and inner wrists. Spray twice. Don't rub. Don't apply to clothes.
Try to learn memorization techniques: memory palace, spaced repetition.
Donate blood. You help the world, and clean your body of forever chemicals.

Biologically speaking, circumcision is not a good idea. The foreskin has a purpose.
Overly technical or complicated language isn't a sign of intelligence.
A good, simple idea is usually the result of distilling more complex ones.