When I had a similar problem I made a thread on how I solved it. Perhaps you will find some useful ideas there.
Failing is part of learning as other posters have said. It is useful to have a process to handle your leeches. This is the name we give to items that cause trouble in reviews. There are scripts that are designed to do some extra study of leeches. One of them is the script that I wrote: Item Inspector.
Another script you may consider is Leech Training. it is a different style of studying because it uses a quiz instead of a table. You may try both scripts and see what is best for you.