I've thought about doing yearly (and weekly) reviews of my progress but it seems more natural to do them as I reach certain milestones in my life.
I find myself doing this naturally throughout my life. Graduating from school, moving to a new city, getting a new job, or quitting my job to travel have all resulted in a natural tendency to write about what I've done and what I hope to accomplish in the future.
Maybe it makes sense to look at these memoirs as a reward for accomplishments, otherwise these reviews fall by the wayside.