
Stay away from porn

Ok, I would have to force him to do that, but seriously, if I tell him "why", he will understand...
After giving him the "Grays Sport Almanac" (Edition 2021), so that he only has to bet on the winner

, I would advise him to lose weight and do more sports, cause I was pretty chubby at the time... I had also massive problems with school bullies back then and I could not defend myself properly. I didn't (literally) fight back. So I would advise him to take advantage of his fists at the next insult, simply to draw a line...
Further on I would advise him not to pursue an academic career. In my case, it was a waste of time...
As for love life: I would advise him not to get involved with the neighbor's daughter (also known as "the slut", 'cause she fucked virtually everyone in the neighborhood) two years later... Oh, and I really would insist that he talk to a very specific girl at school - I didn't find out until years later that this absolute adorable girl was secretly in love with me. But by then it was already too late...