Play an Ocarina of Time when it first came out, which means I was playing straight through with no sleep, until I finally came upon the volcano level and got stuck. I got so frustrated that I went to the GameStop and picked up a strategy guide. Only to discover that the section I was stuck on was actually super easy and I was just sleep deprived. So I went to bed and came back the next day and I overcame that obstacle in like 3 seconds.