To be honest a bit more info is needed to truly be able to help. Do you inject? Do you add something to your foil? What temps are you cooking at? What is you final temp when you want to pull off cooker? How long are you resting? etc.
Personally I inject and and usually add something to foil. My cooking temps are 275*. I go more by feel now than temp when I take it off cooker but when I was temping it was usually 195*ish. I rest mine a minimum of an hour. One issue I had was I was over trimming my brisket. I didnt figure that out until after my season was over but this year I am going to trim way less.
Oversize Load BBQ team