One of the essential tricks to catch the eye is to incorporate one big image that they can see from a reasonable distance. You can choose an illustration or text, a photo or a big image. You should consider a close-up of faces or design elements, illustrations, scenes, and even novelty typography. But you should select a visual carefully. A big and imposing picture in the middle or top of the poster will not only catch the eye, but it will also help in driving the customers. The big image will linger on in the memory of the viewers for a long time, which is helpful in building your brand identity as well.