Brushed your teeth? Check. Put your kids to bed? Check. Switch to resource production gear? Check.
Set a peace shield so that you don't get attacked while you're offline...
WAKE UP IN A COLD SWEAT.
Relax your fingers before speeding up your research, or your click a 30 day instead of a 3 day.
You're new to the game and you just attacked a random person in a random alliance because you felt like it.
Later that day you received a mail for someone 100x more powerful than you saying, "WTF you attacking my alliance members for?! You better run and hide and hope I don't zero you!"
You didn't know what "zeroing" was so you felt curiously threatened and a little afraid.
You spent all your time and resources training troops, only to have millions of troops destroyed from one solo attack.
Here's a tip: no enemy can destroy research, so focus on that.
Knowledge is power. - Francis Bacon
You received 13 ruby gifts, 9 platinum gifts, 17 great heron gifts, and world turtle gift yesterday.
Oh, the random free stuff that could have been yours...
Look at that guy at a measly 300M power. I think I'll solo him...
OH SHIT he ate my whole march!
A troll keeps sending one troop marches at you, so you decide to burn him real quick.
You send out your march and go back to business as usual, but when you see the attack notification and check the enemy stronghold you realize it's only smoking and that you forgot to reset your tree...
You were new to the game and thought that you could escape the rally by random teleporting away.
Nope... now all your troops have vanished and your stronghold has tiny dead soldiers in it.
Your 50% upkeep reduction ended right after you want to bed early, so you woke up to billions of food gone, and your food inventory blinking red.
You knew you were forgetting something after you pressed the craft button.
Enjoy!
Navi
Article 1: The 10 Worst Mistakes You'll Make in Game of War: Part 1
Article 2: The 10 Worst Mistakes You'll Make in Game of War: Part 2
Source: Project Game of War