Plan a dinner and get your family together. Raise a sweet toast to your son-in-law and let everybody know how important he is to your family. Find the quiet moment when you can give him the gift and greeting card you bought him. If you are not going to be able to see him, post a funny quote on his Facebook or share a cute family picture on Instagram along with a beautiful wish. Your actions will make him feel that you don’t just see him as your daughter’s husband, but as your very own son.