Make a small change this week (year?) and aim to be more polite in your relationship.
Why? Politeness can reinforce the appreciation and respect you have for your partner.
Remember small but significant words like, 'good morning' and 'have a good day'. A sincere greeting, a kind wish, or show of gratitude can go a long way in fostering positive feelings on both sides of the relationship.
Be polite even when frustrated with your partner. Just because you are in conflict, it doesn't mean your respect and affection for them has to diminish.
Don't treat a stranger better than you would your partner.
Show appreciation by saying, 'please', 'thank you', and 'I appreciate all you do'. This goes a long way in showing respect to each other.