How to ?

Hey ladies ! Jus wondering if any of you had tips on how to switch from exclusively pumping to drying out the boobs and go to supplementing formula ? I've got a good supply so i may not need to supplement formula...but over the next 6 weeks before going back to work I'm planning to fill the deep freezer that way I'll have enough of a supply built up to still give my girl my milk without pumping my life away ! **No hate or bashing me please. This is my choice. Thanks in advance ! ☺