For photoshop I usually find pictures of Models or pictures of girls on Instagram and Tumblr because the pictures are more high quality.
I desaturate the pictures (make them black and white), change hair color and eye color, fix makeup and acne spots, and I also add or remove piercings.
I love using photoshop because it gives me a chance to work on my computer skills. With Photoshop I can use filters and do different things to enhance your natural beauty, I don't change your body type in photoshop, I just fix any makeup you have on and I add filters to enhance how you look.
I love Photoshop and it's fairly simple to use. (:
I recommend it for everyone, to edit and filter my photos I usually use Photoshop.