Safety should always be your first concern when it comes to buying accessories for your drone. To that end, we recommend you think about what you need on your flight to be safer. Maybe you fly in bright sunlight, so a sun screen is your top priority, or you fly in twilight so that indicator lights should be your concern. After you've ensured the safety of those around you, think about the safety of your craft, where a new case or bag might be in order, as well as a landing pad. Other than safety, I'm pretty sure the first thing you are going to want is additional batteries, and the first thing most new pilots need may be replacement propellers.