Small things are insanely strong and big things are insanely fast (goes for anime too).
The villian will ALWAYS reveil his plan to you when he thinks you are most incapable of stopping him.
Walking into someone elses house and rummaging through all their stuff is perfectly acceptable.
The power of love is undeniable. All main characters' final weapons should be either Love, Friendship or some other sappy BS.
The Recoil on a gun is never strong enough to hinder your aim while flying through the air.
No matter what is going on, a Human is always the mastermind behind the disaster.