Always have your picks on your guitar. This very quick Instructable will show you that a simple pick holder can be placed directly on your guitar so that you always have your picks when you want to play.
Step 1: What You Will Need
Step 2: The Pick Holder on Guitars
Choose your favorite position for the pick holder. The best is when it is less visible. For electric guitar, you can put it behind the neck, at the end of the body. For an acoustic guitar, you can put it at the bottom of the guitar, next to the strap button.