To counteract the serial position effect, what part of a chapter should one spend extra time studying, after reading it from beginning to end a few times?

To counteract the serial position effect, the part of a chapter that one should spend extra time studying would be the middle part.

Explanation:

An individual who has fallen prey to the serial position effect would be advised to read the middle part of the chapter because that would exactly be the part that he would be vulnerable to forget. To counteract any such effect, it would be preferable to go through the content again and again in order to consolidate it in the memory.