Whether you're hoping to improve nutrition, weight, fitness, relationships, work, school, parenting - truly whatever - change itself, and not necessarily the actual changes, is the real challenge.
Finding motivation is also relatively easy, at least when compared with maintaining motivation, and therein hunting for small victories, building a system that reminds you of the changes you're trying to adopt and why you're trying to adopt them, these can go a long, long, way.
Recently my friend (and husband to the world's greatest literary agent) Brad shared a video with me about a man, his dog, and sustained change.
It's definitely worth a watch.