I agree with what was said before that it depends on your degree, for some people it is possible and even a good thing but for degrees like mine with a lot of hours, I don't think it is a good idea.
I haven't got a job during my degree and I don't think I could, I'd just burn out. Plus I don't think I'd have the time. I do physics and I'm in uni every day of the week, usually for the vast majority of the day. Plus we need to do a lot of independent study, a lot of the content is hard to get initially so you need to go over your notes to understand. Even the days when I only have about 4 hours worth of lectures, these tend to be spread out throughout the day, for example I'll have an hour lecture then an hour gap then another lecture then a two hour gap then another lecture...ect. So even though I'm technically not in lectures all the time, I couldn't do a job in these gaps/ during the day.
I do know one person on my course who works quite a bit in a nightclub, we couldn't have a job during the day, he works several nights and from what I've seen it appears to impact negatively on his grades.
Fortunately I'm in the position where I get enough loan to cover everything I need so don't actually need to work for the money but I really respect everyone who manages to work alongside their degree, I just hope you all can manage it without it affecting your degree.