Very good Cough.
Aged about 25 (which sadly was a long time ago) I was in the scarily responsible position of managing a number of training and fast jet aeroplane performance and handling trials (occasionally from the back seat). Fortunately I had a very experienced boss who was very ready with helpful advice, and was working with some very very high ability pilots, who were more than happy to point out bluntly if I was about to screw up (or just had done!)
One bit of advice from my boss that I've repeated often in my mind was: "Before making any decision, always run through your mind the phrase 'at the subsequent board of enquiry'".
I've been lucky not to make too many aviation cock-ups since, but the biggest was certainly one where I'd failed to heed that excellent bit of advice, and I try hard never to forget it again. It was, incidentally, also related to landing performance calculations.
G
N.B. I don't have a C152 POH to hand, but don't recall it actually allowing for proverse factors, only adverse ones. Can anybody confirm or deny?