Stop all fat-burning activities and be lazy as possible for at least 3 days before the U/A, so you dont release a bunch of THCA into your bloodstream (as a result of fat cells being burned), which will end up in your urine to be detected.

Skip the aspirin part of the Dilution method because it is outdated. Back in the day, aspirin was used as an interferant for only one type of test: the first-generation EMIT screen. Since then, a second-gen EMIT (aka EMIT II) was introduced to counter the interference caused by aspirin. As a result, the first-gen EMIT is seldom used anymore (if, at all).