the process, in brief, goes something like this:

1. you write something (if this is the first time through this sequence for this work, it will definitely be bad. that's ok and expected)
2. analyze that, which will reveal some significant flaws
3. figure out some ways that may help with those flaws
4. go back to step one with your improved understanding

this can be very frustrating to begin with, but after a few tries you will start to see some improvement, and maybe even something you actually like.