Here are some documents from
our Graduate Laura Harwood

Recognize that you will probably be underpaid the first couple of jobs, because you will not be understand yet how to judge your time. Don't worry, it happens to us all. Make it part of the learning process. You can charge more as you get faster

How to spec a job
this is document on specing a job from an expert in the field-

Proof proposal
this is how many proofs you are willing to do

Writing a client agreement
make sure you specify how many changes! That can eat up time

Client sign off

Have them Sign off....if they do not, and there is a mistake- they can make you pay for the reprint.