Every toolkit is a little different, just like every writer is a little, well, different (I know what you're thinking. Yes, we're that kind of "different," too.). So what's in your toolkit?
I've got quite a few things in mine, and several new ones have made an entrance lately. There is, of course, the trusty laptop. The Moleskine notebook (they really are the best) and the Pilot G-2 gel pens. The Edgar Allen Poe action figure who got me through NaNoWriMo and oversees all creative activity. These are my old standbys.
The new ones? Index cards and sharpies to help my scattered brain outline (in hopes that this will make for more tension and general freakiness). Coffee shops, in all shapes and sizes. Isaac the cat (who sits next to me and purrs & tells me I'm wonderful).
It all matters. It's all important, at least for a time. And all only good while you apply the fundamental Rule #1 of writing: Apply butt to chair. Write some stuff. Repeat, repeat, repeat.