I'm not sure what your daily eating habits are, but a simple tip is to quit soda for water, It's a small step, but I've found it makes a noticeable difference. You'll consume less calories from quitting soda, plus I've found it makes you want to eat less overall.
Also, try to eat more vegetables during meals to help fill you up. For example, instead of 3 pieces of chicken for dinner, maybe have 2 pieces and 3 cups of salad to fill you up. Salads have incredibly low calories and are really cheap. I've found Costco sells Ready Pac Garden Salads for around $2 for 3lbs, and 3 cups is only 15 calories. If you get hungry in between meals have a apple, banana, etc. to tide you over until the next meal.
I've also made it a habit of keeping a journal of everything I eat through the free app MyFitnessPal and it also syncs together with the C25K app. If you don't know how many calories are in a product it has a barcode scanner that finds just about anything I've thrown at it. Good luck and remember it won't happen overnight, it's a marathon not a sprint!