I think it's a good martial art to learn for a change. I play some games on android that has to do with it.

Ninjitsu is a worthwhile phase to go through for a martial artist to learn.

Hiding and blending in with shadows.

Staying being lighting as to not cast shadows.

Learning how to blend in with crowds when there is nothing to hide behind.

Positioning and concealing one's self.

Effective attacking and escaping skills.

Treading quietly and leaving no traces.

Developing climbing and agility skills.

Having a variety of weapons to discover and practice with and learning to use every day items and found obects as well.

Developing a heighten awareness of surroundings and using it to one's own advantage.

Using reflections and mirrors towards seeing behind one's self or in awkward circumstances.

Sensing dangerous people and their intent quickly.

Using one's memory to remember where exits are located and means of escape.

Remembering faces quickly.

Ambushing and sentry attacking tactics.

Utilising covert skills.

Take advantage of distractions in the environment such as noises or chaos.

Lean how to create diversions.

Study how people move and notice their weakness.

Intelligence gathering practice that includes memorisation techniques.

Improvising in situations wherever possible.

Learn yoga as a way to bend the body in to shapes that fit the environment such as rocks.

Use and create anxiety and nervousness tactics against your opponents.

Wear appropriate clothes for what you are doing.

Learning Samurai.

The Last Ninja