As well as the articles suggestion I would also add the addition of incentives for businesses to move from the downtown core to the suburbs (closer to employees although if unmanaged this could increase urban sprawl which is also bad), bring more people to live in the downtown versus the suburbs, and that sort of thing. In short, as Adman12 said, get people living closer to where they work. And make public transit systems reliable and efficient. More people would take public transit in many urban centres if it wasn't frequently such a pain in the ass.

LouDobbsAwaaaay: Meanwhile, people run electrical appliances/AC/etc at home when it would otherwise be off, while employers still power offices at the workplace. Reducing transportation costs maybe, but are they sure that this would cut power demand?

Well they are mostly focusing on emissions and I believe that overall cars and transportation contribute far more in terms of emissions than the power grid does even during peak periods just because it is more efficient. That and it may be easier to get power grids more efficient and "greener" than cars/trucks/etc.