I think sometimes we forget how important our significant other is in our lives, and take him/her for granted.
Many times we find ourselves being courteous to complete strangers and inconsiderate with our spouses.
Starting today, let's turn that cycle around. Your spouse is the most important person in your life. Start treating him/her that way! When talking to him/her, smile and be polite. Say please and thank you. Ask him/her how their day went. Consider his/her feelings when you have to tell them something.
And most of all, say "I love you" often.
Today, do some small random act of kindness for your spouse. Then give him/her a big hug and smooch, and tell them how much you love and appreciate them.