Psychologically, people tend to feel ownership of something that they obtain and use. That’s why free trials are so effective: your users get accustomed to having access to the product or service and don’t want to give it up. Offer a free trial that’s short enough that people can’t take advantage of it to the full extent, but long enough that users get hooked on it. Tip: Don’t lock features that are crucial to the product’s functionality. Users are more likely to purchase if they get the full experience when trying it out.