People love reading about results. That’s because it’s one of the best ways to learn. You can read information all day, but results show you the practical application of the information. Create content showing real life results. It’s easy in my industry because results are all that matter. But this can work in other industries as well. Here are some non-marketing examples:
See the screenshot below for some of the sections for specific recommendations that you can add which will provide the meat of the document. Keep in mind this is a very flexible document – add recommendations that make sense (for example you may not always have specific design considerations for a project). Remember, it will be different every time you do it.
You mentioned: "many times clients have already done this work. Ask them for copies of their market research reports when you start a project. It will save you a ton of time and effort!" We do this with most of our clients, like you said we have found that around 75% of the have some kind of Market research done, that saves you a lot of time and helps setting up the right SEO Strategy.