The phrase "seized the occasion" means to take advantage of a particular opportunity or circumstance. There are many other words or phrases that can be used to express a similar sentiment. For example, one might say "capitalized on the moment," "made the most of the chance," "seized the moment," or "took advantage of the situation." These phrases all imply a sense of proactivity and the ability to see and act on opportunities as they arise. Whether in business, personal life, or elsewhere, being able to seize the occasion is an important skill for success and accomplishment.