Hi, i have a creative work outside etsys so i have to constantly have ideas, and sometimes its not easy... to me it helps to give it some time, go to the beach or some place quiet in the nature, or sometimes i just go run.
A good trick is to have a little notebook were you can write some ideas you might have during the day, and review it at these times.
Also make some research on what other peolpe are doing, it might inspire your own work too.