Congestion cure

This may or may not work for you, and of course it's limited by whether you have essential oils/can access them or not, but one thing that nearly always works for me is a combination on eucalyptus, peppermint, and rosemary essential oils in a diffuser. It smells somewhat similar to Vick's, but somewhat more plant-y on account of the rosemary. It works with just a smudge of each on either the chest or the upper lip (by a smudge I mean wiping off a bit with your finger from the drop-regulator cap! Any more is way too much) too if you don't have a diffuser. A lot of the other comments here are good remedies too, I've heard of quite a few of those drink/food combinations, and the heat from warm ones (the hotter the better, just don't burn yourself; only the warmest limit you can stand to drink) can really help loosen up gunk, both in the sinuses and in the chest (just be prepared for lots of coughing and nasal drainage once the inflammation relaxes and the phlegm loosens enough to come out!)

While essential oils can be an amazing tool for healing, remember do not put essential oils directly onto your skin without a carrier oil (such as coconut oil or olive oil), such a highly concentrated product can irritate and even burn the skin. I've seen it happen before. Some people say that they use oils directly and nothing's happens to them but most people need to and should use carrier oils.