as far as i know, u need to eat small portion 5 to 6 times per day (including bfast, lunch, dinner)

exercise... cardio and weight training will increase ur metabolism rate.

No you don't. Imagine if someone has a maintenance calories of 1200 cals a day. Try eating 200 cals per meal. That would be a miserable experience because each meal would make you end up feeling hungrier and hungrier. Breakfast, lunch and dinner, maybe light supper.