A few bits and bobs.
My preferred method of weight loss. It isn't necessary to lose weight, and for some it might be a little on the obsessive side, but for me it maximises weight loss by giving accurate information and making me understand that there isn't any magic and I will lose weight according to calories (assuming moderately accurate measuring). This is especially accurate if you use averages, you can work out your maintenance calories and determine when you will reach your goal (to within a few weeks)
is a great tool for logging calories. It has most bought foods in the database and you can store meals and add them with a couple of clicks. Takes me less than 5 minutes to daily log.
Weighing, you should weigh your food to begin with at least (I weigh some, and estimate others, but if I stop losing I find that tightening up on weighing will see it resume, as I usually am over by 200 cals a day or something)
Here is a TDEE (maintenance) calculator spreadsheet https://drive.google.com/file/d/0B8E...N5QWNfeTg/view
And an excel one I haven't tried which supposedly pulls from my fitnesspal https://drive.google.com/file/d/0B5l...45VmlUcEU/view
Good Alternate Method
Would be to designate a meal schedule for the week, log the calories in those meals, then just repeat. I haven't tried this, but no reason why it wouldn't work.
There are less involved methods of course, you can just do things like cut out soda, or switch around meals for lower calorie versions, or do intermittent fasting (skipping meals, and or eating within timeframes). Personally I tend to intermittent fast and count calories (to make some low calorie days). Going low carb works usually just by creating a deficit, though there might be some extra benefit for ladies with PCOS (due to insulin resistance).
Whatever method lets you cut calories with the least discomfort is probably the one you should use (as you will stick to it longer).
I personally do no exercise when losing weight. The reasons for this are:
1. I find it spikes my hunger far more than the calories it burns, making it more challenging
2. I despise exercise
3. I can't accurately measure calories burned, and I do like things to be precise
It is always worth incorporating weight training, if you want to, to help preserve muscle mass, but I personally find it makes my weight not go down as easily (presumably due to muscle gain and water retention). I like to see the scale moving down and I find that personally, muscle memory means I can regain muscle quite rapidly later and mentally I do better seeing consistent loss. You probably should do resistance training though
(I have a neck injury which prevents it anyway).
If you want to incorporate cardio, then go for it. My only cautions here are that you should be careful you don't overeat as a result of hunger induced by exercise, and that you actually enjoy doing it. If you hate exercise, and build your weight loss plan around it, then, you gonna fail.
I might get some hate for this, but exercise isn't necessary, it can make you lose weight quicker, and for some (who enjoy it) it can be great, but it really isn't necessary at all
. I guess like everything there will be variation and some people will do better with lots of exercise and some with minimal.