Some really strange suggestions in this thread. It all comes down to eating simple foods, often, and in small portions. Many people cannot eat what I eat now as they will not tolerate the same meal 5 times a day every day, but I have lost 75 lbs since July 2011 (from 270 to 195, waist size 42 to 34) from this diet along with some light (and I do mean light) exercise (free weights, high intensity cardio). The Western Diet as someone called it is not so simple as 'Meat and Potatoes', because as you'll see, that's exactly what I eat. You can certainly change up what are in your meals if you want to follow a plan similar to mine, but it will take more time (more differences = more prep and more dish cleaning), and cost more (doesn't get any cheaper than chicken, potatoes and water).
Half a chicken breast (seasoned), about the same size in diced baked potatoes (same seasoning as chicken plus a couple extras I like to throw in), 16oz bottled water with flavoring (no sugar no calories) 4-5 times a day depending on your activity level and hunger. I was on regular water for a while, but I tried these MiO flavors and I am hooked. These have COMPLETELY killed any craving whatsoever I could have for soda. I have not had nor desired a soda in 5 months. Strawberry Watermelon and Fruit Punch are my faves, btw.
I cook a weeks worth of meals all in one shot in the space of about 3 hours total (compare to cooking each meal as you need it) and refrigerate them in Gladware square containers like these, then warm them up in the micro for a minute to minute and a half and it's good to go.
Also, I don't ONLY eat those meals, but they are the vast majority of what I eat. I enjoy ice cream, candy, pizza, steaks, anything I want when I'm eating out with the family. Sure I make sure to pick something that isn't absolutely deadly to my diet, but I don't only choose from the 'ultra healthy' portion of the menu either. I rarely get cravings for anything these days as I've adapted to always knowing what I'm going to eat that it has become more of a function of life than a tri-daily event that needs planning. I spend as little thought on what I'm going to eat as I do to breath.
SAVING MONEY.... People always tell me that eating healthy is expensive. That is a LIE. The meals I eat, shown above, cost me, including the bottled water, $1.00-1.50. 4-5 times a day I'm good for the whole day for $5-7.50. I used to spend that much in a single meal in a drive through. Yes I'm eating 5 meals a day every day for $200 a month. My food costs when I was eating very poorly were $450 per month for 2 drive through meals a day at $7.50. Wouldn't you like to lose weight and make money at the same time? It's mind boggling now that I know a system that works that others don't do the same.
I also take a daily multivitamin and fish oil supplement. The costs for those are about $1.00 a day combined.