Another thing to keep in mind is where the surrounding lane is. When clearing crabs, looking to do dragons, or ganking, you must look at where the minion wave is, and where champions are. When clearing first crab, it is safe to assume enemy laners will be focused on farming and avoiding costly trades. However, this means your laner is as well, so don't assume they will be able to help you. When clearing top-side crab, always be checking on where the enemy top laner and mid laner are, to make sure they have not left lane to try to contest crab. When clearing bot-side crab, look at the enemy mid-laner and bot duo. If the enemy laner is pushed up, where the minion wave is close or under your team's tower, this makes taking crab, dragon, or invading enemy jungle very dangerous. Unless you have vision of bushes, you don't have a way of knowing where they are, or if they know where you are.