I use my ipod three times a week. My ear hugging ear buds are a non-negotiable. Running podcasts and a great playlist are always along for the ride. I almost always wear my heart rate monitor for cardio. This helps me stay in my zone by being able to see when my heart rate dips too low. It also keeps me from working for too long in the anaerobic zone. I always wear a good pair of shoes, bra and socks. I need my workout mat everyday for stretching time and 3 times a week for yoga.
What do you find to be essential for a good workout?