When you enter an unfamiliar synagogue, how do you find a seat in a section that's likely to have the least talking?
I would suggest sitting towards the front, or somewhere near the amud. Most of the talking usually takes place towards the rear of the synagogue.
Women' section advice: If the mechitza is down the middle, sit up front. If the women are in back or in a balcony, sit in the back row.
In the Men's side as close to the Rabbi as possible.