If you really wanna see change, you'll want to restrict calorie intake to the maximum safe level that results in no more than 2 lbs a week in loss.
To do that, you'll probably want to aim for daily consumption around 1500 and 2000 calories depending on body size and activity level.
You'll need to weigh (use a postage mail scale) absolutely everything that passes your teeth (keep mind outta gutter! LOL), as that's the only real way to know how many cals you're getting in a day. Don't forget all beverages that have calories. Another one that slips by: bad condiments like catchup that's always loaded with pure corn syrup (and calories).
Ideally, if you're aim is, say, 1800 kcals a day, you'll want six 300-kcal meals, although it's okay to double a couple up here and there when you feel like a bigger meal.
If you keep a diary/log book over the course of months, writing down and limiting your intake, and weighing yourself every single day at the same time of day (e.g., when you first get up), you'll see your weight fluctuate up to 5 lbs up/down every day (this is NORMAL) but you'll also see an overall declining trend in weigh pattern.
It's a matter of physics... stick to that and you WILL lose weight no matter what.
Your splurge day should have few limits.. but don't go too insane..