These handy little white sticker labels (found in any office supply store, e.g. Staples) are actually paper reinforcements for holed paper (think binder accessories). This is simple enough technique -- base coat, flat color*, wait until completely dry, add the sticker, add the tip color**, wait until dry again, top coat, and WAAALAH! Finis!
Tip (pun!): If you wanted to just paint the hole of the sticker labels, that'd give you a nice circle effect or you could just paint the "moon" of your nail by moving the hole of the sticker down so it's halfway over the cuticle.
* I used Revlon's "Midnight" for the base coat which looks almost like a dark denim in person
** For the gold tip I used Nicole by O.P.I's "The Next CEO" which needed 2 coats