- Don't divide characters to two categories. E.g. "Good" & 
  "Evil", "Smart" & "Stupid". Try to make them "Average" 
   as possible.

- Don't write too short (Half a page) or too long (10 pages).

- Please don't do something too twisitng for the plot line 
  (Such as destroying the whole universe or something..).

- Try to be as creative as you can.

- Try developing more personality to the characters 
  (History, like/dislikes, hobbies, friends, love interests.).
 

Well, this is it! I know these are lotsa conditions, but I'm sure they'll worth while at the end!