!!!!!
I am
NEVER hungry. The key to weight loss is
not to be hungry all the time because you're eating so little!
The thing is... a lot of people keep weight on, not because they're stuffing their faces with food ALL THE TIME (necessarily!

) but because the foods that they DO eat are high calorie, high fat, high sodium, high everything.
So, for example, if someone eats a cheeseburger, fries, and a coke, they're consuming probably more than 1,000 calories. Or at least close to it. That being said, that same person could become
JUST as full eating a heaping plate of steamed vegetables with spices and a bit of dressing, a chicken breast and rice or potatoes on the side, with water or a diet soda... and be eating about 500 calories, maybe less.
Like Robin, I stick to about 1,200 calories a day, but I give myself leeway. I'm "allowed" to go up to 1,500 calories a day, guilt-free. And I save those extra 300 calories for times when my tummy's rumbling half way through the day, or at night before I go to bed. I NEVER allow myself to be hungry. If your body's hungry, it's because you need food! Now, your body doesn't need chips and a chocolate bar, but it might do well with a banana, or a few nuts, or a yogurt.
A good benchmark to figure out how many calories you need a day is using a calorie calculator:
http://www.freedieting.com/tools/calorie_calculator.htm
So, for me, someone who's 5'4", 152 lbs, and is pretty freaking lazy (I say I work a desk job, as I spend most of my time in front of my computer, and only go for runs every few days), it tells me that I need to consume so many calories for each maintenance, fat loss, or extreme fat loss.
Maintenance: 1723 Calories/day
Fat Loss: 1378 Calories/day
Extreme Fat Loss: 1216 Calories/day
So, try using the calculator and see what it suggests for your caloric needs.
As for feeling hungry, and the fact that *I* personally believe you NEVER should... there are some really great foods that you can eat that have literally... next to no calories in them. They're called catabolic foods, and some people believe that your body burns more calories trying to break down these foods... than the amount of calories you actually take in eating them!
Here are a few:
Apples
Asparagus
Blackberries
Blueberries
Broccoli
Cantaloupe
Carrots
Celery
Cucumbers
Eggplant
Grapefruit
Lemons
Lettuce
Limes
Oranges
Pears
Peppers
Pineapple
Plums
Radishes
Raspberries
Sweet Potatoes
Strawberries
Tomatoes
Watermelon
Zucchini
Anyhow, my POINT is... no. Do not be hungry. Do not starve yourself. Simply eat a LOT of low-calorie foods, and figure out what your body needs every day (in terms of calories), and make sure it gets that... in the form of lots of healthy food in multiple meals throughout the day. (Some of the other ladies mentioned eating every 4 hours? Kudos, awesome!)
Good luck!