The transition you are about to make is the most difficult one in your career. Patrolman to Sergeant changes everything about how you are viewed by "the guys" and "admin". Stay true to the values and practices that got you promoted. Its probably the most difficult job in LE to do well. You will filter information in both directions (up and down). One thing to always remember is this; What you permit, you promote. They will test you. Let them know early on what will fly and what won't. You can accomplish this without being a prick.
Good luck to you and congratulations on this new chapter in your life.