I am hopeful that you understand that Mulan reference, and if not, get of my website and go watch Mulan. Alright, now for the actual advice part of this post. One things I needed to learn when I first started writing was when to detail and when to not detail. When I was a little writer (littler than I am now, actually) I didn't detail, and then I detail too much. Right now I know that when a scene has a lot of emotion, movement, or beauty in it, you need to add as much detail as possible.
When a scene is a little slow and just for plot, you really just need to plow through and have the reader not get bored with what you're writing. All of this is really confusing, and if I don't explain it well enough, Google it. Having different people give different opinions on one subject is a great way to come up with the mist effective way of doing anything.
this is where i ramble; have fun