What are the best practices for selecting and applying exterior wood door paint?

When selecting and applying exterior wood door paint, it is important to choose a high-quality paint specifically designed for outdoor use. Prepare the surface by cleaning and sanding the door, then apply a primer before painting. Use a brush or roller to apply the paint in thin, even coats, allowing each coat to dry completely before applying the next. Consider the weather conditions when painting, and follow the manufacturer's instructions for best results.