Rourkefan:
If you are more mathematically inclined like me, the goal to weight loss is burning more calories than you consume. 3500 calories = 1 lb. You want to lose 1 lb a week, you'll need to lose 500 calories per day. I tell my clients to split the difference. Each day, exercise to burn off 250 calories and reduce your caloric intake by 250. FYI - a can of soda is roughly 250 calories right there.
An average person should consume about 500 calories per meal, plus another 200-300 calories from snacks, soda, desserts, etc. Daily caloric intake really depends on sex, height, and how active you are, so these are very broad guidelines. For some people, their daily calorica intake could be 2500 and still be healthy for them. Given that, the average person
actually consumes upwards of 1000 calories per meal, especially at dinner. Here's a
Calorie calculator if you want to figure out how much you should be consuming.*
Starting off small is fine. If you go from zero activity to 30 minutes of cardio, you're burning calories and thats a plus. If you cut all your portion sizes in half, you are consuming less calories and that's a plus. The key for most beginners is to not overeat because you think you are burning more calories than you really are.
*Edit: According to this site, this is what I need to consume to lose weight! 1300 calories a day is hard, under 1000 is impossible. Luckily I'm not going for any extreme dieting.
Maintenance: 1623 Calories/day
Fat Loss: 1299 Calories/day
Extreme Fat Loss: 984 Calories/day