Increase Milk Supply Before Labour

hi mommies how can I increase milk supply before baby is born? also when should i start eating milk boosting supplements? legendairy and red date drink did help me out previously but my supply was still low and i managed to latch baby for 6 months only and mix feed all the way before it totally dropped so I want to try to prep early as I really want to give my 2nd baby as much breastmilk as possible.