HIgh quality photo for best photoshop work

I often try the photoshop tutorial provided in the internet..using low quality image/photo mostly taken by cellular phone camera..it seems not be good or satisfied result (compare to the example)...one thing for sure that i have been analyze is high quality photo very determine to what the result look like...but I'm glad that a lot of my edited photo are resulting quite nice because I made same improvement or some other technique. So the key is improvement technique. You should try.

Note:

-Today my camera is malfunction (shutter did not work/jammed)... :(
-Forgot to use WACOM in my design

About My Camera

Right now I'm still using Nikon D70s DSLR photograph camera or with 70-300 AF G Nikkor lens. Really satisfied but I'm not having much more money now to buy a wider lens so it reflects on my photo collection that not much a wide scene or larger view. I'm focusing on detailed object now so I hope it works so well. But if it doesn't maybe a lot of varied angle with do so fine for my collection.