The secret is not only formulating rules where things can go but also where they can't go. This leads to further deductions and a more complete diagram.
I am going to do a tutorial on this soon, hopefully a youtube video once I can get my camera situation figured out.
A last resort strategy is to do something. Getting flustered and worrying about your diagram is a horrible idea. Use the existing rules that you have discerned and make 3-5 different solutions. This approach will almost always solve "could be true" questions. It could also solve "must be true" questions if you note what is common in all the solutions.
Secret to LSAT Logic Games Diagrams?
Linear Mode
