Those who live with me or know me know that I pretty much have every writing tool known to mankind. Having a good grip on a great writing pencil is the equivalent to playing with a beautiful violin or piano. Sure, you can write with anything but if this is going to be my companion for the day you can bet that it better feel awesome in my hands.
I write and edit the old fashioned way. That is, I actually write it all out! I do it in layers. The first draft is written in one color and then I use a different color for the next layer or edit. It keeps my thoughts on track.