One good thing about winter driving is that snowy and icy roads give us a lot better excuse for driving slower.
Plus less hours of daylight.
A lot of what is considered ecodriving is just what has long been good winter driving practice. Dont drive like a jerk, slow down, keep off gas and brake as much as possible, anticipate situations farther ahead, pop it it neutral if coming up to a slippery stop or downhill (yeah its technically illegal in Michigan but its saved me from going sideways countless times). Just drive in the summer like you would in the winter and youll save gas.