Always assume good intent ... and have it yourself too.
Say "I love you" and mean it...frequently.
Be faithful...not just physically, but also emotionally, verbally...and especially in your own head and heart.
Talk it out...and if you find yourself shouting, take a breath, and keep talking.
Do the little things that show your love to your partner...in our case it's jello and foot rubbing (not together
)
Spend time together....just the two of you. It doesn't have to be a fancy date....take a walk, go to the garden center, sit outside and enjoy the day.
Remember that they're human and make mistakes....and the same goes for you.
Remember why you got together in the first place.