Drink plenty of water
Use a saline nasal rinse
Try a humidifier
Sleep with your head elevated
Avoid smoke, dust, and strong odors
Use over-the-counter antihistamines if allergies are the cause
Use a decongestant if appropriate
Try an over-the-counter nasal steroid spray
Gargle warm salt water
Suck on lozenges or hard candy
Treat acid reflux if present
Avoid dairy if it worsens mucus for you
Rest your voice
See a doctor if the cough lasts more than a few weeks
Seek medical care if you have fever, shortness of breath, chest pain, or coughing up blood