Drive as you normally would if you are passing through the area or are on vacation in New Jersey. New Jersey recognizes all other state driver's licenses. As long it's current and valid, you're allowed to drive within the state.
Keep your out-of-state license and drive in the state if you only have a temporary housing arrangement in the state for business purposes or you have a permanent residence in another state along with a short-term residence in New Jersey, such as a vacation house.
Obey New Jersey state traffic laws. Most states have the same basic laws with regards to driving; however, there are some differences from state to state. If you're going to be in New Jersey for an extended period, such as with business, you might consider looking over the state's traffic-law handbook to see if there's anything you need to know. Examples of variations between states include laws having to do with seat belts, car seats, fast-lane traffic, motorcycle helmets and right turns on red. Check with the local Motor Vehicle Commission (MVC) office for a handbook or visit their website.
Check to see if there are any local traffic laws in the area of New Jersey where you are located that are different from the rest of the state. Local governments are allowed to pass traffic-safety rules for their area that go above and beyond what the state requires. Contact the local sheriff's department for this.
Change to a New Jersey driver's license within 60 days if you're moving to the state. If your out-of-state license expires before the 60 days, then you'll need to get the license sooner.