Always read the chat before attacking.

Why?

Other gamers in your club may be organizing an attack. If you attack without reading the chat, you could hinder a battle strategy or ruin an attack between several gamers.

How should it be done?

When you are clear that you want to attack, check in seconds if someone is organizing an attack. If they are organizing it they will say who they are going to attack, try to launch your attacks on enemy cities without hindering your teammates. If there is no one in the chat or nothing is being organized, launch your attacks without problems.