Quick answer
que te vaya bien
Natural: take care / all the best
Literal: “may it go well for you”
How it is used
¡Que te vaya bien!All the best!
Que tengas un buen día.Have a good day.
Que descanses.Sleep well.
Que aproveche.Enjoy your meal.
Where it is said
Everywhere. In Mexico que te vaya bonito is common and warmer.
A mini dialogue
— Me voy, tengo el tren.— I’m off, I’ve got a train.
— Vale, ¡que te vaya bien!— OK, all the best!
Watch out
que te vaya bien
Leaving out the que. Que carries the wish — without it the sentence is just a statement.
Check yourself
Someone is about to eat. You say: