Narrow down the microwaves you're looking at by price. If you have a particular budget or price limit, you can eliminate any microwaves which exceed that amount.
Evaluate the sizes of the microwaves that are in your price range. You will see different options, such as 1.5 cubic feet and 2.0 cubic feet. You get a larger cooking capacity in the microwave as that number increases. If you're viewing the microwaves in person, get a feel for what size will work best for you. Eliminate any models that are smaller than that size.
Review the features of the microwaves that you're interested in to see which ones offer the items that appeal to you the most. Features include warming lamps, cooking sensors, and two levels for cooking.
Browse microwave product reviews on sites such as Consumer Reports or CNET to determine which microwaves have a better rating. This can help you narrow down your search to the best over-the-range microwave for you and your family.