Well according to recent statistics, hardly anyone does. According to the AARP, not very many people make such an effort, or any effort at all towards their estate planning.
Many experts debate the reasons that so few people do anything about estate planning.
Some say its because the subject is inherently unpleasant. Others say the reason is that Americans are basically lazy and irresponsible. Still others say that people don't trust lawyers and the legal system. Probably none of these answers is completely true and correct. You decide to do some research to collect information about your options.