You've pretty much nailed it, especially the last part about the cold. I will run sometimes, but the motivation required to go run when it's freezing outside is frequently beyond my grasp.
Bodyweight only exercise, for example HIIT routines or abs, or even dumbbell based strength training can be done from the comfort of your own living room. I just need 4 square meters.
If you need help, check out http://fitnessblender.com and start at a difficulty level you can manage.
If you need help, check out http://fitnessblender.com and start at a difficulty level you can manage.