I am in the middle of marathon training and long runs are a major part of it. We’re also in the middle of Winter and so I have to watch the weather forecast a bit more closely, but also plan the runs in more detail. Last year on one of my long runs in Winter it was so !@#$ cold that the Gatorade in my bottles froze while I was running and I had to stop at a McDonald’s to use their electric hand dryer machine to get the Gatorade back into a fluid state. While weather is important for your long run, there are several other things I do to prepare for my runs.