Writing is a double-edged sword. The part that cuts the enemy is testing. Concretize what you are thinking and see if it can tango. The part that cuts yourself is that it forces this semantic amoeba into a compressed and unchanging thing. Where you might have learned before, now the jig is done, and you only have the memory of the dance. Don't relish the lights, the music, the laugh, the zeitgeist of the party. Yes, a ballroom can become a world of its own. Know yourself, write what you know, but don't be afraid to change it.
The other considerations are more practical: writing in a professional context (instead of on this backalley scrap of paper) and time.