We often take a small vacation about January and go someplace warm.
I am not a morning person, but force myself to get up and go to work at 7 to maximize my daylight hours.
I have also found that bright lights help. The light bulbs in our house are bright. At work I have a lamp on my desk with three led bulbs (3 bulb adapter and slightly bigger shade). I got the idea from a podcaster that has 2 lamps on his desk for winter.