Me? I’m smitten with Field Notes and use ‘em for all my notation needs.
And for a while there I thought I could keep up, but they keep making these
special varieties that are  a little bit more challenging to snag.
I think a petition to encourage Threadless to sell these is in order.

Some items I like to have on hand when I’m making stuff:
A good pen, portable paper (loving the butcher orange Field Notes),
and if I need icon inspiraton, the Handbook of Pictorial Symbols