[Nick]

1) I hardly exhale through my nose at all. alot of pipe smokers use whats called the breath smoking method of pipe smoking which basically means that you draw the smoke into your mouth and then lightly exhale partially through the pipe and partially through your lips. The idea being that it keeps the pipe lit better nd you get a more even burn.
2) I think the breath smoking method may help slightly with this but it really just takes practice in packing, lighting, and smoking, to get it right also experiment with rubbing the tobacco out partially or fully.

I also highly recomend the frank method of filling your pipe, hes got vids on youtube.