Be Super Observant

The sense humans rely on most is sight. Without it it would be hard to be aware of everything that surrounds you.

Steps

Learn to observe with the corner of your eye. You can catch a lot of things out of the corner of your eye.
Listen to the things behind you. People would generally think you are listening to what is ahead of you and are not aware you are listening to them.
Look all around you. You have to watch your surroundings using as much senses as you can.
Try to look into detail. There can be a lot of things you can miss that are right in front of you.
Try laying low. If you become noticed there can be a lot of things that can block you from your observing.
Practice having a photographic memory. That way can catch a quick glimpse and still see in detail.
Try to give yourself tests like looking around the room for 30 seconds than close your eyes and remember everything you saw like shirt colors, hats, beanies, babies, hair, etc.
Try looking at "Find The Difference" pictures and testing your self. This is used by many police departments to train the detectives.

Observe with your ears as well as your eyes. You may end up being in a situation where listening is more effective than seeing.
Take an eye test to see if you need glasses. You want maximum vision.
To improve your observing, try going in the forest and finding the camouflaged animals.