Look before you leap used to advise caution before committing oneself to a course of action; proverbial saying, mid 14th century.
look down one's nose at regard (someone) with a feeling of superiority.
look the other way deliberately ignore wrongdoing by others.
look to the future consider and plan for what is in the future, rather than worrying about the past or present.
See also a cat may look at a king, never look a gift horse in the mouth, look for a needle in a haystack, one man may steal a horse, while another may not look over a hedge.