One by one (start by noticing any one thing that is obvious to the mind).
First, you can be aware that you’re looking (focusing), or how you feel. How do you feel when you’re reading the email? Or, do you know that you’re reading?
In the reading process, you can start to be aware of anything that is easy for you to be aware of. Try to be aware of something when you’re reading. If awareness is present, then the mind slowly knows the whole process.