some people believe that life should be lived in the moment, and tomorrow is not guaranteed. others believe that planning a future and focusing on tomorrow is better approach to life.

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The biggest issue for you is the fluency, so you may still continue the old style: reason1+ example1; reason2+ example2; by which you are familiar with. After you are very fluently for this pattern, then you can slowly change to new style. By this way you can keep the fluency.