'bons' that I've heard

Bonne journée
Bonne soirée
Bonjour
Bon après-midi
Bonsoir
Bon fin de semaine
Bon week-end
Bonne nuit
Bonne semaine
Bonne leçon
Bon shopping
Bonnes vacances
Bon appétit (every time a teacher walks into the staffroom at lunchtime)
Bon courage
Bon film

And my two particular favourites…

Bonne continuation (when the dessert of our meal was served)

Bon fin de soiree (good rest of the evening…apparently a very trendy thing to say in Paris as it implies you have something very cool that you’re going to spend the rest of your evening doing!)