Okay, I figured out a new combination jutsu that was not listed in any of the walkthroughs.

Here it is:
Sasuke's Sharingan+ Lee's Primary Lotus= Hidden Leaf Hidden Wild Dance.
Sasuke + Lee's combo attack.
Sasuke uses his Lions Barrage, Then Lee attacks with Primary Lotus.
It only hits one enemy, though, but is pretty powerful when used.

One technique I found useful in fights is Naruto's Multi-Shadow Clone Jutsu, if you charge enough chakra you're attacks will do a lot of damage, I managed to kill Kiba and Akamaru in one attack each because of how many attacks the clones got in, so at the beginning of a tough fight, use Naruto's substitution and Multi-Shadow Clone Jutsus.

When your at the chunin exams you should go to the end of forest of death and then keep using the ninja whistle to keep getting EXP and always battle the toad and 2 centipede they give the best EXP if you beat them.

When using attacks such as shadow clones inner sakura or fireball jutsu rubbing the screen up and down is not the fastest way to build chakra for inner sakura and shadow clone use a diagonal motion
For fireball jutsu use circles (not compelty sure about this one)