My conditional reasoning and diagramming skills are usually solid. I often do it the same way it's done in the LR lesson videos.

However, looking at my wrong answer list, a significant chunk of the questions are tagged with conditional reasoning! This suggests to me that my basic cond R skills are alright, but I get stumped by the ways the LSAT tries to trick us, especially on level 4 and level 5 questions.

How can I improve? Where can I get practice with advanced conditional reasoning, and why is the LSAT so good at making cond R difficult?