Rapid game time management

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RVSP16

Yesterday was a rapid tournament and in one game  my opp was in time pressure and I had plenty of time and position was complex I won the game because of his huge mistake.

I had a easy win early in the game but I missed it because of not thinking deep on any move.

I do good time management in classic games and blitz games as they are extreme in fast and slow respectively but in rapid because of blitz practice on chess.com I play without deep calculation what is the solution for this?