Know what? I want to give it a shot this year. I think the most I have written before has been 5k words, so any tips? How should I prepare?
I suggest downloading the NaNoWriMo Report Card. It's a great spreadsheet tool that greatly helped me last year. You input the amount of words you've done each day and it will calculate how many more words you've got to go and words per-day. Typically, it would tell me I'm good when I'd hit 1700 words each day. It will then either tell you if you're ahead or behind the curve, which I used to plan my focus appropriately. Using this tool, I panicked a lot less as I was able to figure out the pace I needed. With the help of this tool, I was able to hit the 50k mark with 5 days left to spare, and when I knew I was going to make it near the end, I relaxed a little. In short, it will track your progress. I can't recommend this enough.