I haven't done this one for a while, but I used to enjoy it a lot:
Get naked (or dressed anyway you like). Lie down on your back on the bed. Place the lower end of a long fitting mirror on your feet, while holding the upper end of the mirror with one hand. With your other hand, caress your body, jack off in your favorite way.
Advantages of this technique: seeing yourself from shifting angles is a nice turn-on; holding up the mirror above you with two feet and one hand restricts your movement (tension/ relaxation of muscles), which produces a different-from-usual, often intenser, orgasm. Enjoy!