What happens next?

How to make rules
Get a notebook, paper, blackboard, or other item to write the list of rules down on.
Something that can be erased may be best, since some changes are inevitable.
Get a pencil or other writing tool to write your list with.
Assemble the group you are part of who will be affected by the rules. Make sure everyone who wants to contribute to the rule making process is present, since objections tend to lead to failure to follow rules.