3. Act like a Crewmate
Talk, vote and accuse as if you were a Crewmate. Be as honest as possible about your own whereabouts, and don’t be too aggressive. If you start yelling “it’s blue!” without a good reason, others will look at you with suspicion. Even if your early game aggression leads to another players eviction, you will have drawn attention to yourself and likely be next to go.
Furthermore, Crewmates are less inclined to suspect you if they think you’re a bit of a noob. An occasional “who should I vote for?” or “I don’t know the name of the room” are subtle ways to help you achieve this. But do not exaggerate; players who continuously emphasize that this is “my first time playing, please don’t kill me” are bound to get voted out.
4. Take initiative
You want to stir the conversation in the right direction, so don’t wait for things to go wrong. After a murder, you might want to casually ask another player where he came from, or what tasks he did. Crewmates cast accusations all the time, so joining in is not necessarily suspicious. If you do so early on, Crewmates may pick up on your accusation and start suspecting your victim.
This rule is even more important when you encounter a witness. If another player saw you near a dead body or even kill someone, you know they are going to accuse you. A defensive position is usually not a strong one, so try to either accuse them first or explain yourself before they get the chance. For example, if Pink saw you walking close to the body before he reported, subtly mention that it was not Pink, as you both just walked into the room where the body was found. If Pink then starts questioning you, you have already explained yourself and are therefore more reliable.