Salary negotiations is something I LOVE! I think there is a real art to it.
First piece of advice, reinforce your speaking points!
"I need a raise." OK why?
I need a raise because I spearheaded this project and executed in a timely manner.
I continue to be a team player over and over again. etc.
Also, don't show your full hand in one go!
SO MANY PEOPLE DO THIS! If you can present 3 points in one go and I disprove one, it is almost as if I disproved 3 and shot down your argument.
Instead present 2, keep one in reserve as a backup shot!
BE COMFORTABLE WITH SILENCE!
After you express your demand, shut up and look them in the eye. Many people will outsell themselves and out speak themselves and almost turn it down for themselves. Be direct, be stern but be open to speaking.
Hope this helps you get that raise you need!