First of all work all the time on how you hold the golf club, have a training grip laying around the house or if you travel put it in your carry on and hold it while you watch the movie onboard. If you hold the club the same all the time, your shots will be more consistent even if they are slightly off line to the left or the right.
Secondly, stretch your body anytime and anyway that you can to stay loose in the neck and shoulder area as being calm there will lead to a longer, more solid swing. Keep the body flexible and your game will improve, period!!!