Smoked all thru nursing school, never cracked a book. Scored in 98% percentile on exit exams. Only 2% of the students in the state had better scores than me. Have Bachelor's of Science with double major in nursing and science. I found that if I smoked before bed and "programmed" my mind to "file" lectures as I slept, I got good results. Sounds silly, but I pictured lots of file cabinets in my head and ordered brain to fill with the lectures as I slept. Good retention and memory recall with this technique.