I hate colds! So how do I get rid of them? In ONE day!?

I have a cold/ticklish throat! I need to get better for tomorrow because I'm going to the Olympic Village and I don't want to miss out! I hate getting cold so how can I make my immune system stronger? Also how can I get rid of this cold by tomorrow? I've had HOT Chocolate and HOT water with honey and I'm having soup now! What else should I do?? PLEASE!