The best gift you can give your partner is to respect them and let them be all they can be. Most people believe Love is the most important factor in a marriage, however I disagree, I believe the most important thing in a relationship is respect for one another.
Show your loved one respect in all things, respect for their opinion, their wisdom, their judgment and who they are as a person. Remember that you married them because you value their judgment. As you walk down this road we call life - you will come to many forks and intersections, remember that their view of the world is valuable to the decision making. Listen to what your partner has to offer and honor that wisdom. Know that you now have someone who you can trust. When you argue about something - ah yes - it can happen. But when you do argue, take a minute to remember that the other persons' opinion is one you value and perhaps the answer is somewhere between your idea and their idea. Most importantly, find a way to respect both opinions.
Kindness - Please do not overlook the importance of kindness, treat your loved ones with kindness, remember that you often find it easier to hurt the one you love. But the fact is, you should treat the one you love KINDER than you would a stranger. I always thought the two most important words in relationship were "Yes Dear", but an old man one time pointed out that the two most important words are "Please and Thank you" - oops, that's three! It has been said that you should always be kind to strangers, because they could be an angel in disguise.
Respect the one beside you and treat them well, because they could be your angel on earth.