Reading is a way of sharpening your mind
By osmosis, you’ll absorb structure, grammar and style. An editor can always spot the people who don’t read their manuscript – they’re the ones with random use of capital letters and no clue how to lay out a page of dialogue.
There’s no magic potion or routine – you have to get your bum on the seat and write. Everyone has a different way of sitting down to write and you have to find your way or routine.