Here are a few tips that I'd recommend:
1. Know your priorities. What do you really need the money for? This should be clear on your mind so you'd know what it is you're working hard for.
2. Stay away from unnecessary expenses. You should first consider if you really need a particular thing before deciding to buy it. That doesn't mean you can't buy things that you like. If you want to buy a new ps3, together with a ps3 hdmi cable, then go ahead! Just make sure that it's within your budget.
3. Consider buying the cheaper alternatives. If you're not that particular when it comes to brand names, then you might want to look at the less expensive products. You could actually save a lot by buying locally-made products than those imported from other places.
If you're trying to save up, then how about trying to practice some of these recommendations?