That's pretty much how I am with everything in life ;). No, I do tend to have times where I am focused more on other projects and during those times new hubs are few and far between, but I will take some time to go in and update old hubs. Sometimes in that process you find inspiration for a new one. Otherwise, I say don't stress about it. We do our best work when we feel inspired, not when we feel we "have to" get something done. Since it's HP and not for clients, I tend to just do hubs when I feel the urge.