It's time I talk about A Round of Words in 80 Days, or #ROW80 on Twitter. It's a writing challenge similar to NaNoWriMo, but is more fluid--you set the goal, and can check in twice a week. Pat Thunstrom made an awesome spreadsheet for tracking progress during it.
This round (June 4th onward) has been kind of a test round for me. I came in three weeks late due to the fact that before then, I had no idea ROW80 existed. But it's good to have the spreadsheet open because it's a visual reminder of progress (or lack of progress, as evidenced by at least 7 days having 0 for their word count...).
For my first book, I kept track of my daily word count in a Textpad file. So I'd manually type in, say, "June 4 +586 words" and have a chart that way. The spreadsheet is much more interactive and gives a lot more data.
For my last book, I also filled up a OneNote notebook with lots of information, but for this one I just have a plot treatment, and I leave notes in italics as I go along. This is partly because I'm rewiting the book from a previous draft, so I don't really need to leave a lot of notes about characters and so forth, as I already have the characters solidified; I just have to keep writing.
I am kind of off track from ROW80, but I hope to catch the next round right when it starts and stay on track for about 500 words a day.