I'd sit myself down and teach myself a bit about formal logic theory as soon as I was old enough to even remotely grasp it. Which in my case is actually probably pretty young. I wasted so much of my childhood being stupid. I easily had the intelligence to skip two or three grades, I just didn't.

At least that's what I'd like to think I'd do, but I'm STILL too busy ****ing around to get serious and do anything with my life. If I actually had a time machine to go tell myself something, I'd probably use the opportunity to troll myself. Like I'd go back, explain who I was, start an extremely vague sentence with something that sounded like a warning, then act like my time machine was ****ing up mid warning, and disappear, leaving my poor younger self to try and figure out what I was trying to tell him. Not even I am safe from my trolling.