This is my summary of the article, quoting and paraphrasing the content.
A child’s regular environment (during time in) needs to be full of positive reinforcers, such as positive interactions, praise, physical affection, and interesting activities, to contrast with the time out area.
Tell your child if they perform an undesired behavior, they’ll get a time out. Tell them this is the only warning.
Once a time out is initiated, the child cannot negotiate their way out or suddenly agree to behave to avoid it.
The time out space should have very little social, sensory, material, toys or activity reinforcements.
Studies show that 2 to 5 minute timeouts are as effective as longer ones for older children.
Make sure the child shows a short period of quiet and calm behavior before releasing them.
If the child tries to escape the time out area, the parent must enforce a backup plan, such as returning the child to the area or taking away privileges.
Once the child is released from time out, the initial command must be reissued, and the child must meet to end the time out procedure.