In Naruto, shinobi battles last a very long time consuming lots of chakra. Even though Naruto has a lot of chakra, he ignored the basics and started learning high level techniques with Jiraiya. Even though this wasn't a bad thing, he just kept learning higher levels of techniques without using the basics, causing him to waste more chakra for high level jutsus.
Why hasn't Naruto learned how the use the bare minimum the start his jutsus?
Know that if he did that, he wouldn't have had to rely on the Kyuubi's power and would probably be able the do rasen shuriken one more time, or at least have some chakra left over for retreating or finishing off the opponent.