I add vapor rub, generally the generic brand. Acts as a decongestant, calms a cough, soothes the throat.

Also when sick I take hot showers. The heat, sweating, seems to help with fever while increasing tiredness so I sleep instead of tossing and turning. The steam clears the lungs and sinuses.

Push water. Even if you have to set an alarm clock to wake you to drink. Water, sugarless tea, lemon juice or apple cider vinegar in water, are far better than soda.

For sore a throat gargle with warm salt water.