If you're coming here from somewhere else, and you have a vehicle that was registered in another state, you'll need to get it registered here within 60 days of your first day of residency or at a new job. 

To register an out-of-state vehicle in Nevada, you'll need:

1. a completed and signed Application for Title and Application for Registration.
2. out-of-state title or registration card.
3. proof of insurance.
4. Nevada Emissions Vehicle Inspection Report (a.k.a. a smog check, which is necessary in certain counties).
5. Nevada VIN Inspection Certificate. (You can get this done at the DMV.)
6. proof of address and identity.
7. whatever DMV fees are required.

Get all of that taken care of and you're officially a Nevada driver. Good luck out there—you're going to need it.