I think there are two stages in commuting.
First, is trial-and error; figuring out what works for you and what doesn't. Bike, tires, panniers/messenger bag, clothes, layering, equipment repair, what to pack, how to pack, etc..etc..etc...
Eventually, you're dialed in. Quick look at the weather forecast and you know exactly what to do. It becomes second nature. You're out the door in a matter of minutes. You're prepared for breakdowns and potential problems. You know when and how to control your position in traffic without having to post on BF.
Sounds like you've entered stage two... :-)