When they are, it's usually by a close relative who feels somehow cheated out of his or her rightful share of the deceased person's property. Generally speaking, only spouses are legally entitled to a share of your property. Your children aren't entitled to anything unless it appears that you unintentionally overlooked them in your will. Write a legal will quickly and easily with WillMaker. Excellent source of information.
Wills are just one part of an estate plan.
This book covers everything from simple wills to sophisticated tax-savings trusts. Explains all major probate avoidance strategies. Create a basic will on your own, without delay, fuss or esq. This book explains it all. Will How to tell when a simple will is all you need.