Adding advertisements to your mini E-Book can be done for a number of purposes. For instance, if you do not want to upsell your own product with your mini EBook, you can find partners who will want to advertise in your mini E-Book and you can ad in links to their E-Books either for a fee or as part of a swap agreement. Additionally, you can insert affiliate links, links to your products, and links to your opt-in list in your E-Book.
There are a number of ways in which you can do this. One popular way is creating an appendix. In your appendix, you can come up with a list of products that you would genuinely recommend – and then give a link to each, along with a short description of what the product is and how it fits into the overall scheme.
Another way in which you can do this is by adding advertisements to your mini EBook on the very first page. Immediately suggest that readers sign up for your course or buy your product. This will work a lot better if you didn't make them pay for the E-Book to begin with. If they paid for it, finding an upsell on the first pages will probably make them angry.
If you circulated your E-Book for free, you can begin the process of adding advertisements to your mini E-Book by building up to certain points that would require your readers to purchase a tool. It would be nice if they could complete your plan for free, but this simply isn't the case in many instances. In many instances, they will have to buy something or learn more – which is why you should take advantage of this by carefully adding advertisements to your mini EBook.
You will want to select tools that you have actually used and will actually provide tangible results for your readers – and ones that actually do fit into the overall plan. This will increase your customers' level of trust and subsequently secure future purchases.