But for Dr. Lisa Medalie, who works at the University of Chicago's Sleep Disorders Center, a new mattress is pretty low on her recommendations for her patients.
"I kind of go with, if it ain't broke don't fix it," she says.
If a mattress is uncomfortable, she says replacing it can lead to a better night's sleep and hunting for a mattress with adequate support makes sense.
Often, however, she says there are other ways to find that elusive restful night. She says try these tips first:
Avoid heavy and spicy foods three hours before bedtime.
Exercising regularly can help with sleep, but avoid exercising within three hours of sleep.
Cut off caffeine eight hours before sleep.
Turn off electronic devices an hour before bed.
Keep the bedroom temperature low.
Use white noise to cut down on ambient room noise.
If it's taking 30 minutes or more to fall asleep several times a week for months, consider visiting a sleep clinic.