Make an effort to be nice to your spouse. Don't belittle him/her in front of other people. Be kind and respectful to one another. Appreciate every effort they make in your relationship. Thank them for it. Be specific when you thank them. "I noticed you did..... It made me smile and I appreciate it."
When they are having a rough day at work. Tell them you appreciate their hard work and all that they do. Teach your children to appreciate the countless blessing they have. Appreciation can come by a glance or a smile. Make it a point to show your appreciation daily.