I first saw this tutorial at Gothic Charm School over a year ago. Since then, I've been dying to try it myself. If you want to look like you just dipped your finger tips on blood, then this look is for you. It's surprisingly simple too!
After you let the base coat dry, brush the red polish just on the tips in a half crescent shape. This does not have to look perfect.
Then, you will be needing a toothpick. Dip the toothpick in the red polish, and dab on the paint in your desired pattern.
Now, you're finished! There's really nothing else to it.