For new players the following actions will reveal yourself to be mafia;

1. Saying too little.
2. Saying too much.
3. Carefully balancing how much your say.
4. Voting too early.
5. Voting too late.
6. Voting randomly.
7. Changing your vote.
8. Revealing your role.
9. Not revealing your role.
10. Talking about roles in general.
11. Posting information about your leads.
12. Not posting information about your leads.
13. Anything you have done differently from a previous game.
14. Anything you have done the same from a previous game.
15. Denying that you are mafia.
16. Being called Zherog.

For new players the following actions will reveal yourself to be mafia;

1. Saying too little.
LURKERS
2. Saying too much.
TRYING TO MAKE PEOPLE NOT LOOK AT THEM BY MAKING WALLS TOO BIG TO READ MORE THAN ONCE.
3. Carefully balancing how much your say.
POSTS THAT LOOK FORCED.
4. Voting too early.
TRYING TO SPEEDLYNCH BEFORE HAVING ANY KIND OF DISCUSSION.
5. Voting too late.
FENCESITTING.
6. Voting randomly.
AVOIDING GIVING READS.
7. Changing your vote.
BEING WISHY-WASHY.
8. Revealing your role.
BAITING A TRUE POWER ROLE INTO CLAIMING EARLY.
9. Not revealing your role.
BUYING TIME TRYING TO NOT CREATE A FAKE CLAIM THAT LOOKS OBVIOUSLY FAKE.
10. Talking about roles in general.
ROLEFISHING.
11. Posting information about your leads.
TRYINFG TO BAID THE TOWN INTO POSTING THEM, THUS FINDING A GOOD PLAYER TO KILL AT NIGHT.
12. Not posting information about your leads.
NOT SCUMHUNTING
13. Anything you have done differently from a previous game.
OBVIOUS CHANGE OF POSTING STILE.
14. Anything you have done the same from a previous game.
COPYING HIS OLD POSTING STILE EVEN IF IT'S CLEAR THAT A BETTER ONE IS NEEDED TO WIN.
15. Denying that you are mafia.
TOWN ClAIMS TO BE TOWN NOT "NOT MAFIA".
16. Being called Zherog.
THIS IS BASICALLY CLAIMING MAFIA,LOL

Anything I should know going into this that isn't covered in the sticky? Other than "Don't vote for me", "X is always Y", etc.
I assume the mafia group knows each other, even though I couldn't see that it was directly specified anywhere.

17. Giving advice to new players.

Still room for one more? I've been in one of these on PP, figured I'd try it again.

Se! Whoa! How the hell are ya?!