Players new to the one plane swing find that a hook is a common fault because the clubface squares naturally, cure this by keeping your arms and body moving through the ball and not letting them slow down.
Develop a pre-shot routine that allows you the comfort of repetition before each shot
Slicers often play the ball too forward and have their shoulders open to the target line, fix this by setting a tee behind and slightly behind the ball and setting your torso and head towards the tee