I have to write an informal persuasive speech any suggestions?

Justin, Here is a good general site on making a persuasive speech.

http://timpview.provo.edu/~jeanar/rock_files/persuasive%20begin.htm

If you are looking for topics.... if it is to be informal, then choose a topic that has "humor" attached. Example, Students should never have homework over the weekend.... or teen-appropriate music should be played in the cafeteria during lunch hours.
I am sure that you have some equally "smile inducing" topics in mind. Let us know if you need further help.

give me one example about persuasive

ahhhhhhhhhhh i need a really intersting speech topic , could be funny also ! something no one else would think of doing. i want to win ! thanks x 33454656575