"It's a wonderful Life". I'm not religious but the message of the movie is very straight forward, and very important. Be a good person, always try to help others, have integrity, and try to make meaningful connections with people. You also don't have to have a long list of accomplishments to have a meaningful life, as long you positively affect others, you've done good.
It's a wonderful life used to be my favorite movie to watch around Christmas time, to remind myself of whats important in life, but now I've added:
The movie "About Time". Slow down. Savor, and enjoy life. Most days I forget about the message of that movie, but I try to remind myself every now and then. It hits especially hard now as my father passed away at 80 last year.