Be seasonal. You may personally dislike holidays but don’t let the "Grinch or Scrooge" lurking within make it into your ads or auctions. If there's a holiday coming, recognize it and do sales and/or promotions related to it. I tried a Red and Green sale on Thanksgiving weekend – in which my subscribers took 50% off any red or green items in my store. My newsletter subscribers have fun with it and they know they are special because I do it for them. If you are able to feature your sale with a hot seller holiday item or two, do so to draw holiday browsers. During the holiday season put a special greeting in your invoices and auctions (use a keyword relative to your store for extra keyword exposure in searches).