Because they always end up at the bottom of my handbag, and because I am always scribbling on the run, I tend to use cheap pens. This is my favourite at the moment. It cost about $1.50 from Danish design store Søstrene Grene. I love the rose gold colour and the autumny stars float around the barrel as you move the pen. They are like Flying Tiger crossed with IKEA, but with a much stronger design ethos, and really cheap.
The photo above was where I was scribbling words for a student on a handy piece of paper, so you can see how nicely it writes in a rush. I also use it to write down bookings in my calendar.
Søstrene Grene have a fast stock turnover and also sell food, pet products, beauty products and furnishings. I particularly like their travel sized beauty tools and their stationery.