The more listings, the more keywords will be hit on searches, the more things buyers have to browse. I also heard at least 2 pages worth of items is good, but the more, the better. I have been adding one or two things daily all week, and when I don't have something to add, I renew an older listing. I know I tend to shop on Etsy at this time of night, after the kids are in bed, but I've been listing during the day. I'm going to try listing at night and see if that gets more views.