1. You don't need to tip in countries where tipping isn't part of the culture.
2. You dont' tip in self service restaurants.
3. You can choose to tip or not tip attendants in full serve gas stations.
4. You don't need to tip on cruises where gratuity is included.
5. You don't need to tip the mail carrier.
6. You should tip housekeeping.
7. You don't have to tip the barista.
8. You dont' have to tip whenever you see a tip jar.
9. You dont' have to tip when picking up take out.
10. You should still tip at a restaurant with bad service.