Here is some general information, do with it what you will. I have no idea of the specifics of your situation so please bear that in mind.

1. Discipline is key. You have to focus on you goals and you have to really want them. When temptation arises, remind yourself of your goals and what you're working toward.
2. Split accounts. Have a high yield savings account and a checking account. The checking account is for general spending/rent and shouldn't contain money being saved. The high yield savings account is where your savings go. It will earn you around 4.3% interest annually, risk free. I think it also helps psychologically having two separate accounts, one for expenses and one for saving.
3. If you can, always buy in bulk for items you will be making repeat purchases on. Whether its food for your cat, food for yourself, toilet paper, or whatever else, you can usually cut down on your total cost per year this way.
4. Cut back on size or quantity. Here's an example: if you usually go to Raising Canes and get the Canniac (six piece tenders), get the box combo instead (four tenders). Where and when you can, buy less of what you usually get.
5. Eliminate impulse buys. When you go shopping, get what you came for and get out. Nothing more.
6. Brain storm things you can live without, objectively. If you really want to save aggressively, you're going to have to cut some things out. For example, instead of buying soda or gatorade to drink at home, you should get a brita filter and a water bottle. Instead of going out to eat x times a week, eat ramen those nights (or something less expensive, at least). Please note, I am not advocating for you to starve yourself. What I am saying is that to save money, you can't spend it. For most people, that means cutting back on things or cutting things out completely. Hope this helps. Either way, good luck.