To become proficient in playing improv, you have to build up your “bag of tricks” in order to have a variety of riffs at your fingertips. If your bag is a little on the light side, you may end up running out of ideas halfway through a solo or early in the set. Another tendency is to resort to the handful of riffs that you are comfortable with which can lead to predictable solos rather than taking the audience by surprise. The 144 Day Practice Challenge is designed to utilize the 12 x 12 structure to advance your skill level and increase your arsenal of riffs which will result in more focused, deliberate, and pointed lines in addition to stronger improvisational ideas. This book is a collection of warm-up exercises which will quickly lead to an improved ability to navigate any situation at any time and in any key so you will never get backed into a corner or caught off guard. The idea is simple… practice what is written for that day. Each day you will have something new to focus on. By the time you reach Day 144, you will have practiced a multitude of exercises in all twelve keys rather than falling into a rut of practicing the same patterns in the same keys all the time.