Apply these 3 simple technique to get more customers:

1. Labor = Love (Ikea Effect): the more time or work we put into something, the more valuable it becomes for us
2. Consistency counts (turn the small sign to the big sign): it is much easier to use the past behaviour and previous experiences into something bigger rather than having a big ask upfront
3. We avoid cognitive dissonance (Aesop’s Fable – Fox and grape hanging from the vine): if it is too hard to reach, it must be bad and we don’t like it

Source: http://techcrunch.com/2015/01/19/the-hidden-psychology-of-why-customers-come-back/