Apply Vaseline around your nails. Be sure not to get any of it onto the actual nail; only on the cuticles and parts surrounding it.
Paint your nails with your chosen colour. Two or three coats is the optimum amount. No need to be neat about painting your nails at this stage at all! Give it time to dry between each coat.
Use the edge of your thumbnail to scrape off every trace of nail polish that did not make it onto your actual nail. The Vaseline makes it slide off very easily. To reiterate, only do this once you are sure your nails are completely dry and Voilà.