I would be very careful about following "never listen to a midwife when they say feed every three hours"...you might end up starving your newborn and feel like the worst mother ever because you may end up back in the hospital with a baby who has dropped more than 10% of their birthweight and suffering from dehydration.
Every baby is different so all advice needs to be taken flexibly - some babies might feed well and be able to last more than three hours, some babies take a while to learn to feed and may need to feed more frequently. Some babies might be too sleepy to wake up to feed even when they need to, and then there's a danger that they might not have enough energy left to start a feed...
Also remember that if you're not lucky enough to have loads of milk for breastfeeding at the beginning, your breasts will need a frequent stimulation from the baby to get things going...
Sorry this isn't the one-liner you were probably expecting but I guess my one piece of advice would be to keep yourself well informed, read a lot about the first two weeks before the baby is born so that you understand the rationale behind all the helpful advice people give you, and so that you can then adjust depending on the specific needs of your baby.