Back in the day before the rise of GameFaqs and the like, stumped gamers would seek solace in video-based walkthroughs to aid them in their time of need. Case in point, this retro-tastic Mega Man 2 video guide from the now-defunct Game Player's magazine, which recently surfaced in this century thanks to Retro Realities.
Yes, there's certainly a lot of inaccuracies and "well, duh!" moments throughout, but I can see how this would be helpful way back when. That or you could have picked up one of these.
Credit: Mega Man Network