You can make a mosquito/chigger bite stop itching for several minutes if you momentarily run it under water hot enough to be painful, but not burn.
Have a meal with some crushed red peppers if your nose is stuffy, you'll find it makes your nose run profusely. Or if you really want the complete sinus-clearing package, take some cold medication, then enjoy the red peppers meal with a cup of coffee - this will completely clear out your nose to the degree that it feels dried out, and it'll remain that way for a couple of hours. I did this while I had a cold for my last college walk-through, they had no idea I was ill.
The cure for acne is water; keep a large Taco Bell-sized cup near you at all times and consciously force yourself to drink from it every few minutes, after the first couple of cups you'll find you'll instinctively need to drink every few minutes, and you won't have to think about it. You'll have to pee every half hour, but you'll see notable improvement in your skin in 48 hours.
Wash your face and then apply shaving cream to shave, this will give you a closer, easier shave.