Revising your novel might be easier than you think – you already have a story to work with, and hopefully a constructive inner editor to play with. But having a plan and knowing what lies ahead will prepare you for the process.
One of the biggest benefits of NaNoWriMo for me is the creative momentum it spawns, even beyond November. Each year I’m energized by the imaginative sparks (and sometimes flames) that result from immersing myself in writing. I also learn (and relearn) important things about time management, discipline, and the value of writing with others.