Tu ferais mieux d'y aller.
You had better go.
Je ferais mieux d'y aller.
I'd better be on my way.
Je ferais mieux d'y aller.
I'd better go.
Tu ferais mieux d'y aller à pied.
You'd better go there on foot.
Je ferais mieux d'y jeter un œil.
I'd better take a look at it.
Tu ferais mieux d'y aller en tramway.
You had better go by tram.
Tu ferais mieux d'y aller maintenant.
You had better go now.
Je ferais mieux d'y aller maintenant.
I'd better go now.
Je ferais mieux d'y aller, moi aussi.
I'd better go, too.
Tu ferais mieux d'y aller en personne.
You had better go in person.
Tu ferais mieux d'y aller en personne.
You'd better go in person.
Je pense que tu ferais mieux d'y aller.
I think you'd better go.
Je suppose que je ferais mieux d'y aller.
I guess I'd better be going.
Tu ferais mieux d'y aller. Il se fait tard.
You'd better go. It's getting late.
Non, ma chérie, tu ferais mieux d'y aller à cheval.
No, my dear, you had better go on horseback.
Je ferais mieux d'y aller avant qu'il ne commence à pleuvoir.
I'd better get going before it starts raining.
Examples from Tatoeba (CC BY 2.0 FR) and Europarl (OPUS). Sentences are not reviewed one by one.