I try very hard to train everyday, Usually an hour outside early each morning of buki waza. Then an hour of tachi waza inside on the mat after work in the evening.
However, there is something about doing sword cuts in the snow that just trips my trigger. So if it is snowing or there is fresh snow on the ground, I'm out making tracks with my boken and jo.
There is the Japanese term "shugyo" that comes to mind here. It means basically, hard, intense, dedicated training, every day, no matter how you feel or what the weather is like, etc. Of course, there is a fine line between dedicated and stupid. I'm thinking I crossed to the stupid side long ago when it comes to training outdoors, but I love it.