HELP ME fellow Nike Fuel Band Friends!!

Hola Gang,

I recently got a nike fuel band and as everyone knows they track your activity and calories.

My question is simple...do i log on MFP the amount of calories i expended all day through my general activities and my exercise ooooorrrr do i just record the difference between my burnt calories before and after exercise?

Am a little confused as i dont want to cheat myself by using the calories ive burnt all day if that isnt going to help me get where i wanna be (tall, slim with rock hard abs: p)

any advice helpful thanks xxx