Since your main goal is to sell products or service it is necessary to put yourself in customer’s shoes and think about the things they would want or not. What does a customer think about and what things run through their head from the moment they realize they need your product or a service until the time when they actually make a purchase.
When talking about the psychology of sales, there are a few facts you should consider. The first one would be that people are actually confused when offered a lot of options. To be precise, offer them a concrete developed product. Yes, shrink their options.