This first example is hung by the computer. Computer rules (with visuals) are listed at the top. On the bottom, the sentence strips can be removed so that they can be handed to a teacher or another student. These are great for verbal as well as non-verbal to work on asking for help or for a turn.
We also struggle with students bothering each other while they are on the computer. So, I created this sign that a student can use to point at or hand to another student if they are being bothered (instead of hit, scream, etc.).
It is placed right near the computer for easy access.
Another visual I have says, "I'm sorry." This is posted near our "time out" chair. That way, when a student comes back from time out, they can use this visual to remind them to apologize to the person they upset/hurt. This can also be removed so it can be physically handed to another person.
If you have other examples, I would love to hear what has been working for you!