At a young age, make sure to research not only proper nutrition, but also what size portions are appropriate at your child's age and body size. Don't over-feed your children, but underfeeding is just as bad! Find the happy medium! And ask your child's doctor about this.

Make sure to keep your home clean and sanitized. And make sure your child starts good habits early. This includes washing hands EVERY time they use the bathroom, brushing teeth at least twice a day or more, and cleaning up tables and counters after meals.

Hygiene can be tricky, but it doesn't have to be. Make sure to teach your children to bathe often, even if it's just a quick shower targeting problem areas that cause odor and so on. Make sure they always wear clean clothes and socks! Don't allow them to wear shoes without socks!

Make sure your kids know that they need to trim their nails with a clipper, not by biting them. It not only looks terrible and can cause their nails to snag on things, it is also dangerous (it can scratch or cut their skin or others) and unsanitary (it can make them very ill).

Most of these things should be common sense, but if you just let your kids follow their instincts and be led by what other kids are doing, they are in for trouble. Be attentive and helpful, and keep a positive, constructive attitude. You may know that your concern is out of love, but you need to SHOW it with a loving attitude!