In addition to getting expert help from NJ Strays you can contact your local shelter, post on Facebook, neighborhood groups, and tell all of your friends.
Lost Cat posters are a good tool for getting the word out in the neighborhood about your missing cat. Have friends or family help with posting signs in your area. Sign up for Nextdoor.com- this is a social media site that will connect you to your neighbors, and posting here can get the word out even faster. The more people who are on the lookout for your cat, the better!