Find out how much your drone weighs
The FAA's new guidelines, which literally just went into effect on December 21st, 2015, require that anyone with a drone register their craft, but only if it weighs more than half a pound. The majority of toy drones under $100 weigh less than that, but know that if you ever plan on strapping a camera to one of those, the added weight is counted toward the minimum.
Get it registered
If your drone does exceed the weight minimum, you have to register before you fly. It'll cost you $5, but it's super simple and done entirely online. However, if you got your hands on a megadrone that tips the scales at over 55lb, first of all, compensating much? And second of all, you actually need to register it by submitting special paperwork.
And I know what you're thinking -- what's the big deal if I just skip it? Well, should it fall from the sky unregistered, you could face criminal charges, pay a fine up to $250,000, and spend three years in jail.