Assuming that it's the TI-Nspire:
b^3's CAS guide has quite a few interesting tips and was pretty much where I figured out how to use the calculator for interesting things
Guide to Using the Ti-nspire for METHODS - The simple and the overcomplicated and this post has some interesting ideas on how to program it by defining functions
Re: Mathematical Methods Guides and TipsLearning the shortcut keys and knowing what every single button on the keypad is essential.
In terms of particular CAS questions, there is a balance between knowing what will be quicker to do by hand and what will be quicker on the CAS. Your textbook (and of course practice Exam 2)'s should have CAS questions - try figuring out various tricks and methods for doing these questions. If there's something you can solve by hand, figure out how to do it by CAS just for the sake of it as well (e.g. finding the equation of the tangent at a point, those linear transformation matrices and so on).
A lot of learning how to use the calculator is just playing around with it, figuring out its faults, figuring out where you can be using it a bit quicker etc.