Initially, you start the 365 project for yourself. You want experience, you want to learn, you want a hobby. While all of these things are important, you don't have to be a lone ranger. If you want to expand awareness, and get some fun portraits you need to include others in your project. Once you start letting people know, it gets others talking. They want a day dedicated to them, because, quite simply, people love photos of themselves. Make your 365 photo a daily update for people to look for in their news feeds every day. Then, before you know it, you become "That guy (or girl) who takes a photo every day".
Social media is key to building awareness and getting others involved in your 365. The idea is simple: You take a photo of a friend, tag him in a photo, then, all of the sudden, all of his friends that you don't know see the photo. You then get people clicking through the album, strangers, that get interested in your work. Before you know it, hundreds of people see your 365 and you had no idea. If you're sticking to Facebook, then expansion is the next step. Sometimes, no one but friends or friends of friends can see your photos based on Facebook's privacy settings. Make your work available to everyone; photography is meant to be enjoyed. Post your 365 on Facebook AND Flickr. Or Facebook, Flickr, and Instagram. Or Facebook, Flickr, Google+, your blog, Instagram, and Twitter. It can be a lot to keep up with, but it allows people you don't even know to enjoy your work because you got a mutual friend involved. It's a chain reaction, and the chain begins with some fun, weird, goofy portrait you took of your roommate.
There are so many bonuses to including others, and one is that they don't let you give up. Say you're 105 days in and you're having doubts. People want your photo of the day, and once you've built momentum, you have a lot more eyes on you. And a lot more disappointment if you quit. No pressure.
How do you keep fresh? How do you keep from getting bored? You got your friends involved, but now, how do you keep yourself involved? Start a challenge. Once, I gave up digital photography (Instagram included) for an entire month. I used film exclusively, and still made sure to take my 365 with film. (Posting it on time does become a problem, but no one has time to develop and take an entire roll of film in a day) It got pretty expensive by the end, but my outlook on digital was fresh, and I took digital photos with new eyes. After getting burnt out on film after a month of intense use, digital photography was interesting and refreshing again. Add a theme to your project for a week, use only a pinhole camera, go to a certain place, or take photos of a single person for a few days. Strategize, it keeps your photos fresh to you and others.
Getting friends and family to be part of your year-long journey will never be a bad thing. It gets people interested in what you are doing, and it forces you to make better work. Not only does it build awareness of your commitment, but it's a way to keep you excited on those days when it's harder to produce something "good" or "creative". It's a good way to stay accountable, and keep that drive do some interesting and weird stuff.