Give yourself a break. Hitting the drive-through when you're too tired to cook doesn't make you a bad parent.
Trust your mommy gut. No one knows your child better than you. Follow your instincts when it comes to his health and well-being. If you think something's wrong, chances are you're right.
Just say "No." Resist the urge to take on extra obligations at the office or become the Volunteer Queen at your child's school. You will never, ever regret spending more time with your children.
Don't accept disrespect from your child. Never allow her to be rude or say hurtful things to you or anyone else. If she does, tell her firmly that you will not tolerate any form of disrespect.
Pass along your plan. Mobilize the other caregivers in your child's life -- your spouse, grandparents, daycare worker, babysitter -- to help reinforce the values and the behavior you want to instill. This includes everything from saying thank you and being kind to not whining.