You will prioritize things in 4 steps.
At first, you will enter the success criteria for your project. These should be somewhat measurable categories, like "Original", "Practical", "Affordable". For each criterion, you can also set how important it is to you compared to other criteria.
Second, you will brainstorm an extensive list of things that you want to prioritize. Most likely it will be things, ideas, products, objects, or elements.
Third, when you are ready with the criteria and the list of things to prioritize, you will evaluate each item by each criterion, such as how original, how practical, and how affordable each thing is.
At last, when evaluations are done, you get the prioritized results. They are sorted by importance and grouped into things to do for sure, things to consider, and things to skip. You can print out the priorities or send them to someone by email.