A couple years ago we had a short-lived weekly topic challenge. The goal was to pick an interesting topic and try to ask new questions about it (along with our other activity on the site). With NaNoWriMo coming up, we'd like to do this again with a particular focus on questions that are particularly helpful for people doing NaNo. All of the usual questions about plotting, style, dialogue, character development, and so on are still relevant, of course (a novel needs all that), but let's think about what additional, special challenges are posed by the NaNo format and also ask about those. Those might be questions about pacing, tools, or even those other things I listed. You who have done NaNo, please tell the rest of us what your major concerns are.
Here's how it'll work:
Post answers to this question suggesting topics (or tags, if you think particular tags are NaNo-relevant). One proposal per answer please. Optionally, explain why this fits with NaNo -- perhaps drawing on your experience of NaNos past.
Vote up the answers you like.
Each week from "soon" through NaNo, we'll pick a topic from the answers here and announce the challenge in a new post (which will be tagged weekly-topic-challenge). During that week, try to ask new questions about that topic. We'll collect links on meta for posterity.
What do you win? A better Internet, help for yourself and your friends doing NaNo, and bragging rights.