How to use "each other" and "one another"

If you know how to use 'between' and 'among', then using 'each other' and 'one another" should be of no problem to you.

1 'each other' is used when two people or parties are involved.
For example, "Ali and John has not talked to each other since they last quarrelled."
"Our football team and yours has not played each other for a long time."

2 When more than two people or parties are involved, 'one another' is used.
For example, "The three boys fought one another over the use of a computer."