Hints and tips on how to make your front crawl perfect. Perfect body postition-where you should be in the water. Head position-the perfect height for your head to be at whilst swimming front crawl. Hand entry-how your hands should enter the water, the right and the wrong way.ints and tips on how to make your front crawl perfect. Perfect body postition-where you should be in the water. Head position-the perfect height for your head to be at whilst swimming front crawl. Hand entry-how your hands should enter the water, the right and the wrong way.