A few we have discovered in the last week:
Our baby always pees and poos as soon as her nappy comes off. When she pees on the laminate style changing mat, it seeps into her clothes and we need to do a full body change, so we started chopping puppy training pads into four and laying them on her change mat - they soak up all the pee and save her clothes and the mat!
We were advised by the midwife that washing regular baby wipes through in warm water is a lot cheaper than buying water wipes and far more effective than using water soaked cotton wool. By using warm water we stop her screaming when the cold wipe touches her bum!