Build something useful with it, if not remarkable, and show that. Take the top down approach. Don't leave it to the readers to figure out a use case because not only it shows the technology in bad light, since it appears that it was created without any purpose in mind, most people are also too busy/lazy to do it themselves.

Really agree with you. Usually I tried to do some side projects/weekend projects if I want to try out something new. For example, when I learned PHP, I build a website with it. Later when I learned AngularJS, I build another website with it(https://pxlet.com). Now I am interested in VueJS, maybe I will start to build a new one with it. This really helps you understand something in deep.