For time:
* Bago - This is the most common and general term for "before" in terms of time.
* Dati - This means "formerly" or "in the past".
* Noon - This means "then" or "at that time".
For order or sequence:
* Una - This means "first" or "before" in a sequence.
* Bago - This can also be used to mean "before" in a sequence.
Examples:
* Bago ka umalis, kumain ka muna. (Before you leave, eat first.)
* Dati, hindi ako marunong magluto. (Before, I didn't know how to cook.)
* Noon, ang bahay namin ay maliit lang. (Then, our house was small.)
* Una, hugasan mo ang mga kamay mo. (First, wash your hands.)
* Bago mo magbihis, magsipilyo ka muna. (Before you get dressed, brush your teeth first.)
The best word to use will depend on the specific meaning you want to convey.