Details, details, details!
I cannot stress this enough. PUT DETAIL INTO YOUR WRITING!
Problem #1: Action details
ex: He walked to the room
Try this: He strode enthusiastically toward the meeting room.
You see? Now you've jazzed up the action of your character.
Problem #2: the word "said." Alright, I'm guilty of using this one occasionally, but it still drives me crazy. So, please, use a word other than "said." Try making a list of words that you can use, it helped me so it should help you.
Problem #3: Character info. I'm getting sick of reading books that don't tell me about the characters. I want to know hair colour, eye colour, hieght, weight,pet peeves, vices, phobias, everything. It helps the reader to better understand the point that you're trying to get across to them.
I hope these tips helped! See ya!