The first step is to decide on your main reason for using a diffuser: do you want to disperse essential oils for aromatherapy benefits or do you want to create a pleasant scent in your home? This can help narrow down the type of diffuser you should look for. Next, consider the size and design of the diffuser. Will it blend into your décor or be a statement piece? Finally, evaluate the diffuser's features and capabilities – how long does it run, how much water/oil does it hold, and can it be used with multiple scents at once? By check these cases, you'll be able to find the perfect diffuser for your needs.