[javajosh]

I do something similar, but not as precisely specified as this. But I like it.

It's similar to my own rule about when to add a tool. I wait until I'm doing something else and I feel the lack of that specific tool. The first time, it's on my radar. The second time, it's time to get the tool. If you get it on first impulse, you'll drown in tools (and won't give the tools you have a fair shake). If you wait too long, you'll acclimate to not using the proper tool.