1)Don't ask to be a mod.
2)Point out little pieces of spam and problems to the mods every now and then, but be humble about it.
3)Be a modest poster.
4)Be a perfect example for inexpirenced users called "Noobs"
5)Use Very good drammar and spelling.
6)Come to newgrounds alot.
7)Have A LOT of posts.
But they really don't need another mod, I think the youngest mod signed up in October 2004, besides that one mod all mods signed up somewhere between 1999 and around June 2003.