People who do not want to go on life support often use a "Do Not Resuscitate" order as part of their end-of-life planning. If they pass away, it instructs doctors to just let them go, rather than fighting to bring them back.
You can leave an inheritance to someone directly if you'd like. This may be as simple as having your estate executor cut them a check after you pass away.
When most people think of wills, they think of property distribution. However, that's just one function of one specific type of will. Make sure you don't assume you know what all wills do and therefore overlook other powerful legal tools while doing your estate planning.