Formal:
* Vivre l'instant présent: This is the most literal translation and emphasizes the importance of being present in the now.
* Saisir le moment: This means "to seize the moment" and suggests actively taking advantage of the present.
* Profiter de l'instant: This translates to "enjoy the moment" and emphasizes the positive aspects of being present.
Informal:
* Profiter de la vie: This means "enjoy life" and is a more general expression.
* Vivre à fond: This translates to "live to the fullest" and suggests embracing every moment.
The best way to say "live for the moment" in French depends on the context and the message you want to convey.