I have one of these Orion Waist Case Accessory Holder for my most commonly used eyepieces, filters, ref flash light.
http://www.amazon.com/gp/product/B00...ilpage_o09_s00
Most often I sling it over my shoulder now as it is cold in New York. During the summer I will likely wear it as a fanny pack.
Grab this and I have just about everything I need for the evening in terms of eyepieces, barlows and filters.