What are the essential tools you carry in your bag? I can clearly say that I cannot do away without my pens. I do a lot of signing office documents so I have the utmost need which even started my fancy for these. In fact it has been a habit to purchase a variety of them whenever I pass by a bookstore or novelty shops. My favorites are jell pens in different colors. Do you know I collect pens from places I have been whenever I travel? I find pens so addicting.