facultus, I passed my series 7 about a year or so ago.
This is what you need to do......
Hopefully you are using STC study material, they are the
closest to the real thing. Dearborne sucks.
After reading the chapters take about 10 or so practice finals found in the study material over the course of a few days. They are long but you'll get through them.
If you are scoring around 80%, you should definitly pass.
On the questions you are getting wrong, go back into the chapter
and skim over the related material.
I must stress take a lot of practice finals! This is the key. I scored an 86. Good Luck.