Yup, these are a must have..

Why?

If I have to answer that question than that means I will probably be hired by you at some point time to do some really big project the likes of which you will try and pay me a meer fraction of what the project is worth, and expect me to jump through hoops back wards while juggling your ridiculous deadlines and uninformed ignorant ideas of what "good design" is.

Ooops did that sound bitter?

Sorry.

Carry on