Everywhere I go I take my sketchbook.
Sketching is easier than taking pictures, or at least it is more reliable to your memory, because you do not sketch what is there, but only what you see...
(I don´t see cars in front of buildings, I don't see electrical wires all over the place... Photos do.)
..and when you get home and open the sketchbook, you'll see what and how you saw, and you'll have the same feeling.
I leave here some of my registers.