I think you have been given a given quite a few links to get a calorie allotment.

I am about your height and started at 246 so I'll give you my personal plan. I know sometimes it's hard get a picture of what it all looks like...

I eat between 1500-1800 cals a day. To keep hunger at bay and carb cravings down, I like to get a good amount of protein in. My carbs I like to keep around 200 grams a day or less, my protein between 75-100 grams (the closer to 100 the better), and fat makes up the rest. I don't really watch my fat that much, I just try to make sure it's healthier fats. I have 2-3 slices of thin bacon in the morning with my egg white omelet and 3 grams of butter on my toast, everything else comes in the from lean meats, healthier oils, and occasionally some chocolate.

Don't underestimate the effects of exercise too. I am physically limited in some activities so most of my exercise comes from walking 30-40 minutes most days of the week, along with some tai chi, yoga, and whatever strength training moves I can do.

I hope that helps. It can be tricky to figure out where your sweet spot might be. Staying under 1800 seems to do the trick for me. When I go over, things slow down to a crawl.

I think you might want to ease into dropping your calorie allotment so your body adjusts easier. It seems to help me not be so hungry when going back on plan. Just slowly decrease my food intake for a week or two til I am in the range I want to be.

One thing that I have found is that by consistantly eating about the same amount of calories everyday tells me how much weight I will lose. If I eat 200 - 300 calories over my ideal amount of calories, I will lose like .80 pounds per week. At that rate I would be an old woman with long grey hair. So, I reduced my calories until I was losing at least 2 pounds a week consistantly. Make a chart and keep track.