Even when I was little I hated the platitudes, "You have to make your own mistakes," or "You learn from your own mistakes". I always figured why wouldn't you primarily learn from the mistakes of others and then work to avoid those? Hell, there's libraries out there full of grand mistakes. Before you venture into something unknown, give it a quick check online or on YouTube to see how others might have fucked it up. Do you think the guys in the WWII tranches "learned from their own mistakes"? Hell, no. "Jimmy just blew his ass up stepping on a muthafuckin' landmine over there... But I'll give it a go anyway 'cause I really have to make my own mistakes."