As graduation season looms, parents and friends are trying to pass along their wisdom to help prepare those about to walk across the stage.

If you could go back in time – what would you tell your 18-year-old self?

Arapahoe High School graduate, former 9NEWSer and current NBC News Correspondent Tom Costello shared a letter he’d write his 18-year-old self.

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Courtesy: Tom Costello
Courtesy: Tom Costello