Limiting, but not totally depriving them of sweets, preferably healthy ones. Making sure they get enough sleep and not over-stimulated in the two hours before bed time. Giving them nutritious meals, teaching them proper hygiene, working with them but not for them, when they need homework help,and giving them unconditional huge amoutns of love, especially when one does not feel especially happy with them for some reason.
Above all, IMO, BOTH parents must be equally involved in their children’s upbringing, even when the mom is the primary caregiver. I am disturbed whenever I see fathers who have little or no time to spend with their children, even on weekends. Dads who will not make the time to come to the PTA conferences, or who think kids’ sports activities are shtuss, so they don’t need to watch them play, are missing out on a fundamental chance to bond with their children. It is wonderful to learn with your kids, but what do you do until they are old enough to open a Gemarah with you?