Formal:
* Mag-ingat po kayo. (This is the most polite way to say it and is used when addressing someone older or of higher authority.)
* Pakibantayan po ang inyong sarili. (This literally means "Please take care of yourself.")
Informal:
* Ingat ka. (This is the most common way to say it to friends or family members.)
* Mag-ingat ka. (This is similar to "ingat ka" but slightly more formal.)
* Ingatan mo ang sarili mo. (This literally means "Take care of yourself.")
Using "sana" for a wish:
* Sana mag-ingat ka. (This means "I hope you will be careful.")
* Sana ingatan mo ang sarili mo. (This means "I hope you will take care of yourself.")
It's important to choose the appropriate phrase based on the situation and your relationship with the person you are speaking to.