Shop around for your bills, I actually wrote a post about this on my student blog which you can read here. It's important to remember there any many companies out there offering different prices on bills and with awesome comparison sites, it's a lot easier to find the best deals.
Freeze food, it sounds strange but go shopping late at night and pick up all of the bargains then pop them in the freezer, it's the perfect way to get cheap bread and veg which is good for days after it's sell by date.
Pre drink before a night out! Just drinking with your friends at home before heading on a night out can save you a ton of money as you need less when you're out, plus that means more money for cheesy chips *wink wink*
Loyalty cards are your best friend! With loyalty cards for just about everything these days it's totally worth getting them for the places you shop, whether it be Tesco or CEX everywhere has them and points = money off and rewards *bonus*
Have nights in, although uni is about the experience and of course it's fun to go out, you can also have fun indoors with your friends, have a movie night (which I also wrote about here) or even just a night eating pizza and cake (my favourite kind of night) it usually always works out cheaper than going out and feels a lot better in the morning too!
What are your tips for money saving?