Quote Originally Posted by xman
Yeah, the best advice on that is simply to always know where the edge is and what it's doing. That's your focus and if it doesn't waver you shouldn't have any problems.

X
XMAN has good advice here. Be mindful of the edge and always be aware of the tip! If a razor is really sharp (as it should be), the tip can cut you without you feeling anything. It happened to me on one of my first shaves. Very errie to not feel any pain, it just started bleeding.
-Fred