Pokécharms

If nothing else, it'll teach you how to learn. I know, bear with me, that sounds dumb. But when you're grumpy and old like me, you need to be able to learn things for work, or running a house, or paying taxes – even if you don't have any interest in it. What you're doing right now might seem pointless, but stick with it – you can never know what you'll find useful in the future!