If it is tricycle gear, do as papa says and make sure that the push rod is in the outermost/least sensitive hole. Also, when taxiing an tricycle gear, give a slight amount of DOWN elevator as that will push the nose gear to the runway for better control. To have a controlled take off, you need to be able to drive in a straight line so practice taxiing until you can go straight down the runway at just below take off speed.