Before you write anything, commit yourself to deciding the theme of your mini EBook. It sounds like something obvious enough, but many times, we will begin writing a project, whether it be an article or an E-Book, and we wont have any clear theme in mind. What does this leave us with? Usually, a jumbled writing project that has no clear focus and it makes it a lot harder for anyone to derive benefit from it.
So start by deciding the theme of your mini E-Book. I've say this dozens of times, but I will continue to say it: pick a theme that your audience wants to read about, not one you want to write about. Again, this seems obvious enough, but when deciding the them of your mini E-Book, there is always the temptation to simply write about something we want to write about, regardless of whether or not anyone can actually benefit from it. And what does this leave us with? A product we can't market because no one wants to buy it.
Before deciding the theme of your mini E-Book, spend some time feeling out the market. Look at aggregate data. Put polls on your website. Post on related forums and specifically who wants to know what about your subject. You might be surprised at how positive and useful the comments will be.
Once you have determined whether or there is a market for your E-Book, you will want to consider how saturated that market already is. You can do this with a brief scan of Google. Do the top twenty sites in your niche have high PR? If so, it might be a good idea not to plan to outcompete them with search engine optimization. Instead, plan on using social marketing techniques. Perhaps you can even pull off a joint venture with site owners.
In any case, determine a relative level of supply. If demand is high and supply is low, get into the market immediately.And there you have it: a simple plan for deciding the theme of your mini E-Book.