Send Out Cards
Consider the idea of introducing products that people are already using. Now consider introducing the greeting card system of Send Out Cards simiply by sending cards that are less money than going to the store picking out a card addressing it etc and then mailing it.
Healthy Coffee Tea
I have met one person in the last 30 years who only drinks water. Everyone else drinks coffee or tea or hot chocolate. Really easy to introduce the product and the business opportunity.