My philosophy is, honestly never collected anything that I don't play. I know a lot of people that collect guitars, but for me, I want instruments that I play. And if I don't play them, I don't' want to have them sitting in a closet collecting dust.
Listen deeply. Meditate on that which is arising. Even if it's boredom or difficulty or maybe a feeling of being stuck, that in itself can be the work for your practice.