the biggest thing i find with students, NOT doing, is Looking at the big picture, the coast is behind you, mountains in front, so you should be on a westerly heading... etc etc oh and try not to let your heading drift when your head is down doing calculations etc if the aircraft is trimmed correctly, it wil fly straight, some students will do 90eg turns while looking at maps or doing fuel calcs, then continue straight ahead on the new(incorrect) heading.