Once you've been married for a while, 1 year, 2 years, 10 years.... it's not only a lovely idea, but it's also very important to revisit your relationship and the vows and promises you made to each other on your wedding day.
Your anniversary is a great marker in time to do this with a Vow Renewal Ceremony or a Reaffirmation of Vows. This gives you the opportunity to keep striving for your original goals, or reevaluate them and make new promises to each other.