Counting the pot

[KJL]

Whenever I play live NLHE, I run into trouble counting the pot. I usually am fine from the flop on, but preflop, I keep getting confused with raise or re-raise situations with the blinds. Does anyone have any tips, like just waiting till the betting is done and adding up the remaing players and the dead money, or is this ability just gained through expereience. Any advice is appreciated.
TIA