This used to happen to me as a young pilot. It went away when I received my instrument rateing. Why? Because the trim switch, or trim wheel became my best buddy. Do a flight useing just the trim wheel. Maybe not take-off, or the flare during landing. But everything else. Practice holding altitude within ten feet, and heading within 1 degree useing trim only. Its actually very easy to do and supriseing how little it takes. Then you will learn to grip the yoke with your fingertips only and keep your elbows on the arm-rests more often. Works pretty well in most non-electric trim aircraft. This was a technique taught to me by an old head who flew Military Lockheed Constellations in the Gulf of Mexico during Hurricanes. You well develop that feather touch that will be the envy of all other pilot's. In a Boeing or an RJ its a little bit of a different ball game, but still sound advice.