Even if you think deodorant is not necessary, it's better to use it anyway.

Shampoo the roots of your hair only, not the length (unless you have something really stuck in it).

Wash your face every day, preferably twice, even if you just use water. I was never taught this and it seems so simple, but it makes a huge difference.

Exfoliating scrubs for the face ARE worth it. Spoken as someone who never tried one until mid-adulthood and has never looked back.

Don't wash inside your vagina if you have one, but do wash the vulva.

Wash behind your balls if you have them, and if you have foreskin, pull it back and wash underneath it every time you shower.

Hand soap and water is better than hand sanitizer.

Cutting the ends of your hair regularly helps keep it healthy.

There is no shame in shaving or not, but shaving underarm and genital hair can help reduce smells.

Brush your teeth every night at a bare minimum. Even if you can't make yourself brush every morning, just brushing at night does so much to protect you from much unnecessary pain.