Best way to maintain weight after weight loss? should i slightly increase my calories or keep them at them low?

Exercising?: Simply make sure the calories burned = calories taken in. Continue habits of a healthy diet and moderation. Remember muscle weighs more than fat, so if exercising, especially isometric (AKA "lifting")' then might gain weight if you're having muscle gain while losing fat or it's stable. Stay in touch with primary doctor. Congratulations, Keep it up!

BMR: You should calculate your basal metabolic rate and determine what your calories should be for maintenance. www.myfitnesspal.com has this calculator available for free.