You should have a leech script, that is a script that will point out the items that gives you trouble in reviews and let you do some extra studying to get them right. The two best ones IMHO are Leech Training and Item inspector. (Disclosure: I am the author of Item Inspector) These two scripts are different and in my opinion complementary. Some people use them both.
Aside from these two I also recommend:
- Heatmap
- Ultimate timeline
- Double-Check
- Lessons Filter
- Dashboard Progress Plus
- Self Study Quiz
- Fast Abridged Wrong/Multiple Answers
There are more good scripts than this but these ones are my personal favorites.