(I think this should apply to any writer- new or old.) A plethora of tools- Pens, pencils, notebooks, a computer, one REALLY good dictionary, and one REALLY good thesaurus.
I enjoy having multiple types of writing utensils because it helps me during my writing process. It may be strange, but there are days when I can only focus while using a laptop, whereas mostly I can only focus whilst using pen and paper. That being said, there are even days where I HAVE to write in pencil, or I HAVE to write in black ink. It simply depends on the mood.
Stress balls and slinkies are also great tools- While you obviously can't physically write with them, they help with the writer's block.
The last, and most important things every writer MUST have (And yes, this part is VERY cheesy...but true!) You need to have an active imagination and some kind of passion.
If someone doesn't have those last two "tools," they will never be able to get anywhere with their writing.