Use a saline spray or a Neti pot (with distilled or boiled-cooled water). Reducing nasal swelling often relieves ear pressure.
A deep, exaggerated yawn stretches the muscles around your Eustachian tubes. Fake it till you make it. how to pop ears when you have a cold
Save this for your next cold (or share it with someone who needs to hear it – literally). Use a saline spray or a Neti pot