well done for taking the first step by admitting you need to lose weight and taking the positive steps for asking for advice. Try to keep things simple and break your weight loss down to half stone goals. Keeping a food diary really does help, if you write down every single morsel you eat, it really makes you think twice about nibbling between meals. If you tend to binge on foods like cheese, buy a low fat block, cut it into 8 and individually wrap each piece, even freeze them and just take 1 out daily. Use very low fat soft cheese spread intstead of butter. with a knife, score lines down the cheese to make 6 segments, then just use 1 per sarnie. calorie counting really does work, although some people find this tedious! You could stick to 1500-1600 cals for your first 2 stone, then go down to 1450 cals for next 2 stone and end with 1200 -1250 for your last stone, as you need to adjust your calories to fit in with your metabolism, which changes as you weigh less. As for exercise, that depends on how much you take now? if you live a sedentary lifestyle, you could start with 20-30 mins of walking. Buy a pedometer and set small goals for yourself, keep track in your food diary of all the extra steps/time walking you do, this way you can see the progress you make.
If you would prefer to do the dieting, without the scales, on the day you begin your healthy living plan, measure youself all over and keep note in your indispensible food diary! Then every week or two, take your measurements again and write them down.
I find letting myself have 200 'i can have anything' calories really important, as this way i do not feel i am being to harsh on myself. Also, a once a week treat of your favourite food, just in a smaller portion could help keep you on the straight and narrow.
Best of luck to you. It really will be worth it in the end.xx