I (thankfully) never have to juggle between games. When I was a kid, my parents had a 'one game at a time' policy that was seldom broken. To this day I thank them, because the practice still stands. I take my time in picking out the game that I want, and even if I want to play a few of 'em, I suppress my urges and pick one. I play the hell out of that game, and then later on, I move to the next one. What usually happens is that the games that I have 'completed' are games that I can comfortably revisit whenever I want.

I have an Ambassador 3DS, and you'd better believe I haven't played 60% for longer than 20/30 minutes. When I have tons of games to choose from, I usually end up going back to the games that I've already completed. It's this weird habit that I have, so it's best that I go through it one game at a time.

Thanks Mom/Dad