I never learned to do backflips off of buildings or how to shoot fire out of my hands but in my time spent studying genuine ninjutsu methods I found the following to be some of the more useful teachings.

4 Elements Breathing Techniques. These are 4 exercises for regulating breathing, heart rate, energy and emotions.

Earth Element - This one is the most useful and is the identical technique used by Yogis to lower their breathing and heartrate to almost imperceptable levels after years of practice. It is most useful for controlling stress and getting your heart rate under control by means of regulating the oxygen intake and controlling the oxygen levels in the blood.

Us a slow, deliberate and long inhale (approx. 8 seconds to complete) and force your abdomen out to draw more air into the lungs. Hold no longer than 1 second and slowly exhale (approx. 8 seconds to complete) the air as completely as possibly by drawing your abdomen in. After 10 cycles the heart rate will be noticably lower and you will be calmer.

The esoteric influences in ninjutsu suggest a mental vision associtated with the Earth (picturing mountains, trees, etc.) but that is secondary to regulating the oxygenation of the blood. Run around the block and get your heart rate as high as possible then try the above exercise.

Fire Element - This one is for getting energy and motivation and is often used by athletes. The key is to rapidly make the blood oxygen rich.

Use a rapid inhale (approx. 3 seconds to complete) and hold it for no longer than 1 second followed by a rapid exhale (approx. 3 seconds to complete). After 10 cycles your heart rate will be dramatically higher and your energy levels will be up. Be careful with this one, if done too long you can end up pretty light headed.

The esoteric influences of ninjutsu suggest a mental visual associated with fire but that is secondary to creating and oxygen rich mix of the blood.

Wind Element - This one is more for controlling emotions. If you are too emotional and lacking intellectual reasoning you can use this one.

Use a rapid inhale (approx. 3 seconds to complete) and hold for approx. 3 seconds followed by a sslow exhale (approx. 8 seconds to complete). The esoteric influences of ninjutsu suggest a mental visual associated with wind.

Water Element - This one is more for controlling emotions. If you are too emotionally detached or too absorbed in intellectual reasoning you can use this one.

Use a slow, deliberate and long inhale (approx. 8 seconds to complete) and force your abdomen out to draw more air into the lungs. Hold for approx. 3 seconds followed by a rapid exhale (approx. 3 seconds to complete). The esoteric influences of ninjutsu suggest a mental visual associated with water.

how much for the wall-walking sandels?

Quoted: I may try those, as long as nobody will be offended if I don't use their proper names. I just feel funny talking about doing my 'water-breathing' excercises.

Don't worry about names. I just included them in their proper description in case some shinobi fact checking ninja nerd showed up.

I use the first one (Earth) all the time. One of ourt shooting drills is to run from the target line back to our rifles and engage targets while the heart rate is way up. I use that first breathing exercise to get it under control as rapidly as possible.

Bumped cause real ninjas come out at night.

Quoted: And we only come out at night because if we fly to close to the sun it burns.

I thought the wax in your wings melts.

Quoted: Speaking of ninjas...   In The Last Samurai, were those ninjas that attact the village at night druing the play?

Yes.