Formal:
* Mag-ingat ka. (Mag-ingat kayo for plural)
* Ingatan mo ang iyong sarili. (Ingatan ninyo ang inyong sarili for plural) - This translates to "Take care of yourself."
Informal:
* Ingat ka. (Ingat kayo for plural)
* Ingat. (This is a shorter, more casual way to say "be careful.")
* Mag-iingat ka ha. (Mag-iingat kayo ha for plural) - This adds a little emphasis and can be translated as "Be careful, okay?"
You can also use specific phrases depending on the situation:
* Mag-ingat sa paglalakad. - "Be careful walking."
* Mag-ingat sa pagtawid. - "Be careful crossing."
* Mag-ingat sa pagkain. - "Be careful eating."
Choosing the right phrase depends on the situation and your relationship with the person you are speaking to.