Hii!
Before attending a meeting, you need to keep in mind various things such as, - Do a thorough research of the topic or issue you are attending meeting on, be presentable, be attentive, create a agenda, and scheduled a meeting, circulate the important information priorly and during the meetings too, have possibilities for arrangements and listen to every speaker carefully.
Proper norms should be followed and there should be equal chance for everyone to Interact and put forward their views.
Hope this helps.
Good luck!