This time of year is tough, cold as what here today, 1* this morning! its tough to tell yourself to have a good day if you don't believe it, you've got to believe its going to be a good day. I usually find work gets me occupied enough to get my mind off the depression although that doesn't always work either, when i get in a funk i tell myself that it will pass eventually and change up what i'm doing at the time.
If i can't get out of the funk, i either watch a movie or play a video game, this lets me take things in but not have to process them, sometimes it takes a little while to because interested in the story, but it uaually works for me
Stay strong, hope you feel better!