When making an important choice, we often use the phrase "took a decision." However, there are many other ways to express this idea using different words and phrases. Instead of "took a decision," you could say "made a choice," "came to a conclusion," "determined," "settled on," "opted for," "resolved," or "selected." These synonyms can add variety and clarity to your writing or speaking. It's important to choose the right words to convey your meaning, and using a synonym can help you do that in a more precise or impactful way.