Keep the rhythm and tempo in your backswing and downswing smooth and steady.
Finish in balance with a full follow through with about 90 percent of your weight on your front foot.
Don't pick up your head and don't quit on your follow through. Follow through until the club reaches shoulder height will help you get as much distance as possible from your shot and also help keep it straight.
Remember not to over swing. A good golf swing is not necessarily an overpowering golf swing. Your goal should be to build a smooth and repeatable swing.
Practice these fundamentals at the driving range as often as possible, to groove a swing pattern that is consistent and reliable.
Slices and hooks occur for several reasons. Always check your alignment, slow down your tempo, release tension in your hands, and make sure your club stays on plane in your downswing. A club that is off plane will not be square to the ball at impact, creating a sliced or hooked shot.