so to boost milk supply I'm supposed to eat, drink lots of water, rest, relax..how do you manage to…

so to boost milk supply I'm supposed to eat, drink lots of water, rest, relax..how do you manage to do those things while taking care of a newborn and three year old, feeding every 2 hours, keeping up with the house, and keep up with my toddlers potty routine?..on like 4 hours of interrupted sleep? I'm exhausted!