First of all ... CONGRATULATIONS!

Second, I've been married for 15 years. For me, the key has been that it's about the marriage, not the wedding. The wedding was one day. Since then I've always tried to impress my wife like today was another date. She's my top priority and you should make your spouse your top priority as well. Yes, things will calm down and you'll get into a pattern, paying bills, choosing towels, but that doesn't mean you can't still compliment your spouse daily, surprise them once in a while and always work on strengthening your relationship.