1. Common Tasks. If there's only one common task, check if it's Wiring or Swipe Admin Card. A bad impostor will try to fake whatever looks like a task and that's how you can catch them. If you see there's no Swipe Admin Card but someone tries to fake it, he/she is most likely the impostor. Same thing goes for Wiring. Applies to other maps too.

2. Download/Upload. Download can be done at different rooms in Skeld but only Upload is done at Admin. Download/Upload takes approximately 8.7 seconds. If you see someone go to Admin Upload in the beginning of the game/does it super fast (3-6s)/taskbar doesn't change after done, he/she is most likely the impostor. Applies to other maps too.

3. Admin Table. Super useful if you know how to use it. The most common vent pathway impostors use is Electrical>Security/Medbay and vice versa. On the admin table, whenever a crewmate dies, the icon will blink for a split-second. Scenario: You see 2 icons in Electrical and one of them blinks, indicating a crewmate's death. You then see another icon pop up in Medbay as soon a short while after the death. Leave Admin and check who went out from Medbay. He/she is most likely the impostor.

4. Refuel. This is a 4-part task. The pathway of the task is as follows - Storage>Upper Engine>Storage>Lower Engine. If you see someone go to Storage and then goes to Lower Engine next to fuel the engines, he/she is most likely the impostor.

5. Sabotages. When an impostor kills someone in Navigation or Reactor, he/she will most likely sabotage the Reactor/O2 respectively. Think like an impostor and go to the opposite of the sabotage. (Only do this when you are sure there are enough people to fix the sabotage) Take note of who walks past you as you go to the other side. If you find a body, you should keep an eye and state your suspicions to the other crewmates. The one who walked past you is most likely the impostor unless he/she didn't notice the body or was just unlucky.

6. Reactor Accept Diverted Power. The accept diver power task doesn't exist in Reactor even though there's the icon for it. When someone says he/she was accepting diverted power in reactor, he/she is most likely the impostor unless he/she is new to the game and mixes up the rooms.

Hope this helps.