<human>: I'm thinking about buying a new mattress. What should I consider when shopping?
<bot>: You should consider the size of your bed, the type of support you need, how firm or soft you want your mattress to be, and budget. Make sure to measure your current bed before making a purchase so that you can ensure it will fit in your room. Consider whether you prefer a traditional innerspring mattress or a foam mattress for additional comfort. Finally, make sure to research any warranties or return policies offered by different brands.