It is very hard to imagine what it's like being a homeless person during the winter, but it helps to know that we compared to other countries, have a much better relationship with the homeless and are good to keep a warm hand over them. Nonetheless there is always something that can be improved!
As for yourself, do what you can do, give them your pocketchange or whatever. I'm sure whatever you have to give, does make a difference. They might have chosen this path for their life, or maybe they have not, but everything has a reason and a story. They are a part of community so therefor also a part of you, one way or another!
I'm not sure if this guy is homeless or not, but he got my attention for 10 minutes and 20 kr and was very happy about it. It doesn't take much to make someone happy, so why not!