One way to train yourself to see things is to use dresser drawer.
Empty drawer- have someone put ordinary items in drawer one layer in depth.
Close drawer, open drawer look at items for 30 seconds close drawer.
Describe placement of descrition of items.
First couple times is difficult, keep practicing, after awhile you will be able to describe items and placement without thinking.
Another way is to look at town street same way 30 seconds turn around, name cars parked,colors makes, describe people on street.
Again after some practice t becomes second nature.
Best thing is to trust your inner voice, many times the subconscious registers danger, when conscious mind does not.
Great points.