Make it reversible, when we make it possible for someone to back out of something we're increasing the #Trialability. The Agile community seems to have this one down pat. We tend to call it an experiment. We ask could we try this as an experiment for 4-6 weeks and gather data on the outcomes?
Reduce Upfront Costs, is one way to improve #Trialability. I found it interesting to learn, people value a savings of $5.99 with free shipping, over a $10 discount on the product itself. Free shipping resolved uncertainty, where a discount for even more money does not.
I guess I'm an odd duck, I look at the total cost of ownership