I'm doing Weight Watchers. A lot of people lose 5 pounds the first and even the second week, and even may keep losing 3 or 4 pounds the next few weeks. But that slows down and they discourage more than 2 pounds a week after the first 10% of your starting weight is lost. Really, it's hard to lose more than that anyway if you stick to the plan and make sure you use your daily activity points.
I didn't know when to say "no" or listen to my hunger signals. I grew up very, very poor, and we often didn't get enough to eat. I've still got the mentality that abundant food is "special" - and eating out is "special" - and I have a lot of emotional ties to eating and not denying myself anything, now. WW helped me learn strategies for coping with that. I do Core, so I eat enough to satisfy me from a list of foods (lots of nice, sensible, healthy foods), and anything else has to be counted like the regular WW plan.
My biggest change was sitting down and thinking about when I eat, and why, and then planning ahead. I even plan my snacks. I know I'll be hungry for protein in the mornings when I come in from doing chores, so I eat a moderately big breakfast with eggs and ham or Canadian bacon, fat free dairy, and lots of veggies and a piece of fruit.
I know I'll be hungry for something carby to help me "unwind" when I come in from training the dogs, so I spend my "points" on high-fiber English muffins, whole grain bread toast, whole grain crackers, or a mini bagel with low fat cream cheese. Sometimes if I'm really hungry I'll have something Core, like a bowl of grits or oatmeal, and of course I always grab some veggies or fruit.
I know I'll be hungry for something light later in the afternoon, so I plan a soup, or a salad, or a steamed veggie, or a bowl of canned fruit, or plate of mixed fruit. At night for a bedtime snack, I have fruit, a cup of half gourmet flavored coffee and half skim milk, and if I'm really snackish I'll have some air-popped popcorn, a bowl of cereal with skim milk, or a hard boiled egg.
In addition to this I have my three square meals a day. I've noticed since I started this, that I've reversed my order of eating - I have a big breakfast (I was a card-carrying breakfast hater my whole life), then a moderate lunch, and then a very light dinner. I've noticed that I am much more alert in the morning now - I get up literally two hours earlier, and actually have a brain before noon. I sleep better, too.
I don't drink anything (other than the coffee) but plain water or seltzer water. Every time I give in to the sweet craving and start drinking diet drinks, I get to craving other sweet stuff. I'm sensitive to most artificial sweetener anyway - everything but splenda is a big no-no and splenda does weird things to my digestion if I get too much (this is distinct from the very severe problems I get from too much alcohol sugar liek malitol or sorbitol - [8-O]). I've learned just falling behind on my water can screw things up dramatically. When you are losing weight, your body needs water to process what's leaving.
Ditto on the fiber in the fruits and veggies (legumes too). It's not just good for you - these things literally work to remove fat as you consume more energy than you put in. I try to make sure I eat berries every day, in addition to taking an antioxidant - as we know with the dogs, we use up antioxidant stores when we process fat. All of this helps get rid of the fat without feeling starved or exhausted all the time.
I like how the plan is laid out very specifically. If I follow it, I lose weight. If I start fudging, I don't lose much. I can then go back and say, well, look, I got behind on my 6 waters a day - or I didn't eat 5 servings of fruits and veggies. It keeps me accountable and that's huge. I don't feel like I'm on a diet. I feel like I joined a big family who helped me get my life back. Sorry for the corniness, but I'm just gobsmacked at how well this is working.
I've lost 40 pounds in a little over six months. I still have a very long way to go, but in two more pounds my BMI will drop from "obese" to "overweight" - I'm so pleased with that, not to mention fitting into stuff I haven't worn since I got pregnant with my seven year old son!