How to clear a stuffy nose?
You can try to eat something really spicy, such as a raw chilli, Tabasco sauce, mustard, horseradish, or a raw onion. This does definitely clear a stuffy nose, but can be slightly unpleasant.
Alternatively, fill a bowl with boiling water, add some Vicks vaporub or eucalyptus oil, and place your head over the bowl, with a towel covering your head to inhale the steam (being very careful about the hot water).
Alternatively, try a combination of Olbas inhalers and Vicks vaporub applied topically.