Avoid perms and straighteners.

They can dry out and damage delicate hair.

If you like your hair highlighted or colored, go for natural hair color, made from vegetable- and mineral-based dyes with essential oils.

Ah, but I can't go without perm. I have this detestably straight, very fine hair that is absolutely unmanageable without perm. Any styling I try to do just won't last. Perm, on the other hand, works wonders: my hair suddenly has volume, and it keeps the styling for a decent time. I have longer hair, so I only do perm once every 6 months or so. I suppose it is not too bad.