I didn't work in my first year, but I had to get a job for second year as I just didn't have enough money.
For anyone going University of Leicester I recommend tour guiding. You can sign up and it doesn't matterif you can't do any of the days you stay on the books. You get emailed about open days and you just say whether you can or can't work. It's usually a wednesday morning. You guide students and their parents round campus, then take them on a tour of the accomodation. You'll probs have someone come and talk to you about it when you start in halls.
You could also get a job serving dinner in halls. Not very glamorous but means you haven't gotta go far to work.
There's the union bars, or the union shop. Although be prepared for late nights! When the licensing law changed my mate who works behind the bar had to work til about 6 in the morning. She ended up just hanging round til our half 8 lecture!
There is also an "employment agency" called Workbank in the union. They can help sort you out.
Alternatively you could always try asking in the city centre etc for jobs. It'll be coming up to xmas so they'll be looking for temps.
If you already have a job, you could always ask for a store transfer. Leicy has all the major shops.
I work in Evans as well as doing Tour guiding. I also seem to have prostituted myself out to other departments and have been doing prospectus packing. As well as working for the careers service by doing telephone work.
I still managed to get a 2:1 in my second year. As long as you're sensible and make your uni work come first then any other employment will just help earn you bit extra drinking money! Plus you'll make loads of friends at work as well.
Also, if you are thinking of applying to the bars or union shop, you need to apply the first few days of term, otherwise you'll be put on a waiting list of like hundreds!
Hope thats of some help.