I'm just generally curious about how others go about deciding what next addition they need to make to their collection. I'm personally of the mindset that if I can't use it regularly, I don't need it. In addition, I like to think I have a pretty rounded collection as far as uses and any addition I make needs to fill some niche I don't have covered. I've heard many other schools of thought on this and have personally gone though several changes in my attitude, but I wanted to know if there was a consensus here.