KNOW your rights because cops WONT tell you
If you get stopped n they find drugs DONT SAY SHIT, request to talk with your lawyer an shut the fuck up until you do. You WILL go to jail, that's inevitable, just deal with it, but unless you admit the shit is yours they can not charge you with it.
Do not say you have smoked, if you say that it is considered possesion
DO NOT smoke in your car, that gives probable cause because you may not smell the weed stank but they sure as fuck will
DO NOT sell out of the places you chill at cuz that's an excellent way to get raided n have you and your friends sent to jail, if your friend is doing this, slap his/her stupid ass n walk out
If you are being followed by a cop, park at the nearest spot, lock your door n walk into watever building you are by n kill time, even if they do get out with you they can't search your car without a warrent or probable cause, and you going into a store to "buy a soda" is not reason to search you
DO NOT act nervous, they can sense that shit, tell yourself you are not gonna get in trouble to ease the nervousness
And lastly do not keep plants anywhere visible or smellable anywhere by ur house so if a cop duz come knocking he can't pop you with a felony intent to sell, that's a bitch to deal with later in life