This is a very popular topic at LGB as I believe they hold the US annual record for RW incursions....
I'm not bl00dy surprised! They have 5 seperate runways with no less than 8 points on the airfield where one crosses another and often with three in use at any one time, which raises another point:
Make sure you are fully aware of the implications of a 'Land and Hold Short' clearance. You will be recommended to reject such clearances if at all unsure, but you do need to know to expect them at the busier airfields over there. I can't imagine you not being quizzed on this in your BFR.