Mindfulness Plain & Simple question

Hi all,
I wrote this little book a few years back and am hard at work on my next book. Of course, I want to improve on my first book but it's hard to critique your own work.

For those who have read it, what advice have you got for improving my work next time around?

So far I am planning:
Stories/experiences from mindfulness practitioners
Clearer examples of everyday mindfulness and
Simplified, improved explanations of the elements of mindfulness.

What else would you suggest?

Cheers,
Oli