I have something to add:
If you want to lose weight and even enjoy losing it and then be able to keep it off, I found that only when my motivation was fixed could I succeed. I looked in the mirror and didn't like what I saw so I started doing all the usual things. But it was difficult and slow and always a chore. I did OK but it was just always blahhhh. Later I tried again and this time I had the angle of 'this is what I do to take care of myself'. Instead of the motivation being negative or fear-based, when it became positive and about loving myself or looking after myself everything changed. I have lost the weight I wanted to lose and I don't need to lose anymore, but I remember how it was to be heavy and my body just functioned in a crappy way. Aches and pains, slow digestion, no energy till late in the day etc.
I think a lot of women have self esteem issues and if you look in the mirror and think ugh and then get on the bike that isn't positive and loving to yourself and it's like stabbing yourself in the foot - it isn't positive reinforcement. You do have to admit there is something to be done, obviously, but instead of pedalling away thinking of yourself in the future as some marvellous being, think of yourself as OK now and that now you are taking care of yourself. Don't do it for your kids or for your husband, do it for yourself. Do it to have energy and to try some new clothes and to treat your body in the way you should, at least as well as you treat your fish.
Men seem to need fear to motivate them, I work with a lot of middle aged and older men and most of them will only do something about their puku when the doctor tells them they have diabetes or a heart problem. There must be a better way for men to get their positive motivation going.
And no matter what, if you eat only toast and tea or coffee for breakfast , you can wave goodbye to feeling alive until after lunch. You wouldn't feed your fish the cheapest crappiest food and expect them to be active and colourful, so you should also feed yourself nutritiously. I have a thing about good breakfasts!
Last comment, I found a lot of good foods that work for me in the Blood Type diet. Since following those principles my weight has been very stable. My type needs no wheat (but I do eat puddingy treats on weekends) and lots of small portions of red meat and fish protein (and sometimes those foods are too expensive). But I do recommend trying it out. But again, you have to see losing weight/doing exercise as looking after yourself and being good to yourself and not a punishment.