This is the part where many DIY manicures go wrong. Apply a very thin first layer of polish to your nails. Very thin. Swipe each nail three times, covering a third of the nail with each stroke. Include just a bit of an overlap per stroke. Allow the polish to dry completely. Letting nail polish dry undisturbed is the single most important step in any manicure. Some nail polish dries faster under UV light or in sunlight. You can also use a fan to speed drying time. Don't rush. Great nails are worth the wait.