I can write down several programing languages and web technologies that I master (PHP,HTML5,MYSQL,CSS3,JQUERY,ETC,ETC,ETC)
but how much percent I master each of them?
School degrees are not guarantee that you really master what you were taught.
Web technology are changing constantly
for each web technology you've got to reed more than 500 pages books to master it
Even it's not enough
To manage yourself with tons of information and data you've got to adopt a new style of life
using the newest technology to process big data as Mindjet mind manager,macros,hotkeys and everything that help you to automate tasks
Finally clients only want what they need; a good quality product.