It depends on the weather and which job I'm going to. If I'm going to my hospital job, they provide the scrubs so I usually am in some sort of athletic clothing because I don't want to dirty up my normal clothes. (I only have enough jeans/tshirts for about 3-5 days.) If I'm going to my mobile crisis team job, I wear what I would wear for that - jeans or BDUs with thermal underwear and boots, and my agency shirt and jacket on top. Considering most of my coworkers are hippies anyways and most of our clients are homeless, I'm usually the freshest one there despite riding in.
If I'm going to the store, I'll wear weather-appropriate clothing. I always go out with helmet, gloves, and safety glasses, so I guess that's most consistent "gearing up" I do.