How can I effectively prune an overgrown dogwood shrub to promote healthy growth and maintain its appearance?

To effectively prune an overgrown dogwood shrub, start by removing dead or damaged branches. Then, selectively trim back long or crowded branches to improve air circulation and sunlight exposure. Cut at a 45-degree angle just above a bud or branch junction. Avoid cutting more than one-third of the shrub at a time to prevent stress. Regularly prune in late winter or early spring to promote healthy growth and maintain its appearance.