You will note that Glasgow is close to Iceland, Norway and Sweden and kind of on par with Canada. I'm from the Northeast of America, which is (relatively) much more southern. While this explains the fact that it's always cold - I had no idea that we were so far above the inhabitable parts of Canada - a side effect of being this for north, there is not a lot of sunlight during the winter months. Seriously, in December the sun set at like 3:30pm - you get maybe 7 hours of sunlight on a good day. If it's raining, which it might be, you might not get sunlight for days. It takes some getting used to! (I would not recommend having Seasonal Affective Disorder here.)
Okay! So what is the #1 piece of advice for living in a city? "Don't walk around at night."
As you can imagine, this isn't very helpful, because it means that you can never walk around after 4 pm. (Obviously there are places in a city - any city - you shouldn't walk alone in at night, and I know that.) This strikes me as being rather inefficient, especially as the places I would be going are safe/well lit - I live quite near the big shopping streets (the high streets, as they're called here) and if I'm coming from/going to another major part of the city I'll be on public transit, so I generally try to disregard this warning, but I've studied rape stats and all that long enough to not be a little bit wary sometimes.
Luckily, the sun's been setting at more reasonable times (4 pm) now that we're inching into springtime. However... this means that in the summer, the sun will stay out laaaate - like 10, 11 pm late. All this nighttime takes some getting used to; I imagine 10+ hours of daytime will take some adjustment too.