Well, here we are, sitting around, twiddling our thumbs, and waiting for midnight to come for the official start of this year's NaNoWriMo. (If you aren't part of this, but want to make the attempt at writing a novel in a month, it's not too late to sign up at the NaNoWriMo website.)
As with NaNo and any other creative endeavor, a little encouragement goes a long way.
If at all possible, surround yourself with the types of people (family, friends, online acquaintances) that support you. In my experience, even knowing one person is watching your back and wants you to succeed can be a stronger fuel than 100 naysayers you want to prove wrong.
There will always be those who "caution" you against falling flat on your face. These people are quite frankly afraid to see you succeed because trying so hard at something non-standard isn't their bag. I don't know of any artist who hasn't had to overcome some "friendly advice" of people who aren't interested in trying harder than the average.
If you're going to make your dream a reality and you're going to do crazy, off the wall things, like write a novel in a month or make the declaration to achieve something no one else around you has done, then be prepared to shed from your creative living space the "helpful warnings" as well as those who speak them.
When you look back on this month of November, or back on any project you set out to do, you want to see yourself as the person who did. The person who gave their all and completed the task. If you're starting out with NaNo for the first time this year, or if you've tried before and didn't "win," then know that I think this is your year. This is your year to sit back on December 1st and say, "Hot damn, I did it," and glow with an inner light you may not be familiar with.
If you have no one else in your life to support you, know that I support you. Know that you can do this. Be determined to achieve your goals. As the Evil Queen instructs Snow White before biting the apple, "Don't let the wish grow cold."