I have recently started a newsletter for my blog. This is my first mailing list and I am looking for some tips for promoting it. I have a small 7 page report as a free giveaway and am writing more(2 will be launched next month). Any other advice on promoting newsletter? Will it be better to write one big ebook of around 70 pages or dividing into small reports(as I also have to write for blog) of 20-30 pages each tah target one specific area related to niche. What do you say?