Summarize:

If there have been recent crimes in your area, chances are interest is high. If not, enthusiasm might be low, but remind your friends and neighbors that the majority of crimes in the US are property crimes, and that a Neighborhood Watch is best-suited to combat property crimes. Gather information about recent crime in your area. Speak to other neighbors, inform them of the facts, and ask them about their interest in participating in a Neighborhood Watch. Distribute flyers inviting all neighbors to a Neighborhood Watch meeting at a central gathering point in your area. Assure your neighbors that there are many ways of participating, from being a window watcher to being a block captain. Everyone can help! Ask new members if there are any additional crimes they want to address or feel particularly threatened by. Any Neighborhood Watch, though managed and composed of your community members, will operate with the help and supervision of the police. The Sheriff's Office should assign a Crime Prevention Officer to help train your members and determine if a different or increased Neighborhood Watch structure is necessary. For a Neighborhood Watch to be successful, it is essential that local law enforcement and citizens understand each other. You may be starting your Neighborhood Watch program because you are dissatisfied with local law enforcement, but keep in mind that oftentimes local law enforcement can be concerned with city- or even region-wide crimes. Remind your local law enforcement about your community's needs, and ask them how they can help you.
Ask neighbors if they're interested in starting a Neighborhood Watch. Determine further interest via door-to-door campaigning. Reach out to local law enforcement.