The Cycle of the Hero

Call to Adventure:
After Luke realizes what he must do to save the princess he goes to find Obi Wan. After they get past the sand people and find R2D2 again the real call to adventure comes. Obi tells Luke that he needs his help and he thinks Luke could become a great Jedi. Obi asks Luke to come with him to help save the princess. This is Lukes call to adventure that he accepts, which starts the cycle of the hero.
Threshold of Adventure:
Soon after Luke, Obi, R2D2 and C3PO begin their mission they have to find someone to fly their ship to Alderaan. Which is when they come across Han Solo and Chewbacca who after a conversation of payment agrees to take them to Alderaan in his ship. Now Luke has his helpers and can begin his mission to save the princess.
Tests: There are many tests in this story. Their first mission seems the hardest and that is to rescue the princess from her cell. When they get trapped and are forced to fight they end up in the garbage dump. However they sneak past all the gaurds and make it back to the ship. But when they leave the space station they are one short, because Obi was killed by Darth before he made it to safety.
Triumph: The triumph is when after all the other fighter ships have gone down and died Luke is able to save them all and destroy the space station. The most amazing part is he used only the force to help him decide when to shoot.
Threshold Struggle: They have accomplished their mission in reaching the space stations weak point. But Luke is very upset that R2D2 seems to be injured from the fight. However he is restored and back to good as new!