It happened to me about an hour ago as I was compiling my definitions database. I thought it'd serve me well to describe all the weaponry, clothing and armour in my world, and I actually felt like knowing my world better with each excel cell filled in. So far I've defined 7 kinds of swords and a couple of armours, but more are to come. They do help me a lot with keeping things consistent.

Today was the day I realised how much I need OctoPrep.