Yoshi: Ok so keep in my front pocket a black uni-ball vision elite. .08 writing thickness i believe.
Yoshi: It writes thicker than your “normal” pen.
Yoshi: so i keep that in my front pocket.
Yoshi: At work i keep a 1 black one and 1 red one. So i write out my GTD lists once a week now. Anything important that needs my attention that day is written in red. Red items are my must do.
Yoshi: Here are what the pens i use look like:
three pens

I did finally find the post he wrote that talked about the pen he uses: Notepad GTD

And so I don’t have to look it up again, Product page at officedepot.com

Thanks, Yoshi!