[header] How to strengthen your mind [title] Stick with hobbies that challenge you. [step] If something you're already doing consistently challenges you and keeps you engaged, it is strengthening your brain. In fact, your brain requires challenging stimulation to continue becoming more powerful. 
Hobbies that continually force you to do new things, like learning to play a new song, are ideal for working out your brain. [substeps] An important distinction to consider: playing a difficult song that you've already memorized is much different than learning a new song.