Kindergarten & Preschool for Parents & Teachers: How to Build Self-Esteem in Young Children
7 Ways to Improve Your Child's Self-Esteem - I have found this one in particular has been very helpful for me lately: Focus for fifteen minutes a day per child of interrupted one-on-one time. Great results may be seen with only fifteen minutes of uninterrupted concentration on a child. Then they may have the desire and confidence to play/work/learn on their own giving you some down time.
Calm Down Jar - A creative approach to time-out. Child first shakes the jar to get their frustrations out, then they're asked to wait until the glitter has all settled on the bottom. That's when time-out is over.