Here is my issue. I've been on MFP since late July, which is my first real attempt at weight loss in my life. I work retail as management, so I'm on my feet a lot. I also do martial arts 2 to 3 times a week, which constitutes a decent portion of my exercise. I have lost weight, and I've noticed my clothes fitting looser.
My problem is I'm not exactly sure how many calories I should be consuming in general. My BMR is 1768, but in truth I have very little idea as to what that means. >< My calorie allowance on MFP is 1640. Since learning a little more about exercise calories, I've upped my food intake, but I would still appreciate help in figuring out what exactly I need to do.

My diary is public, if you want to see what I'm doing. I try to keep my food intake around 1400 or less, usually.
Oh, and since I did start keeping track of sodium, i definitely noticed how much over I am, and am working on cutting that back significantly.
Any advice would be most appreciated!! I've been looking through a lot of the topics, and just need some clarification.