Best practices for onboarding and integrating relocated employees include providing them with a clear understanding of their new job responsibilities, setting goals and expectations, assigning a mentor or buddy, and organizing social events to help them connect with coworkers. It's also important to provide support for any logistical challenges they may face, such as finding housing or schools for their children. Additionally, checking in with relocated employees regularly and offering opportunities for feedback can help ensure their successful integration into the new location.