My pens are giving out and I'm looking for something new :-). What are your favorite pens or markers to sketch and wireframe with?
Recently discovered Muji pens... Love 'em and they're cheap on Amazon
Paper Mate Flair
I use felt tip pens in a variety of colors for my notes, sketches, wireframes, etc. You could choose 1 or 2 colors to keep it simple, but I like picking colors for whatever suits the project (or my mood).