Amy Baldwin has a nice article on when people usually think about getting wills. Typically they get wills when they are married, buy a home, have a baby, get a divorce or go on a vacation.
She states that most estate planning lawyers say whether married or not, every adult, starting at 18 needs to have estate planning documents.
In general when people turn 18 they need to have a Florida medical power of attorney . With the new HIPPA regulations parents can not depend on being able to find out about their injured child and provide instructions for their treatment. In Florida and other states, many doctors will not release information to a spouse much less an adult child. Before your child goes to college, you should have him execute some common Florida Estate Planning Documents.