Professionals work by contract. A contract is an understanding for how the goods and services will be exchanged for payment.
It is important for us to have an understanding of what you are going to do and why you are going to do it. The redo project is an opportunity to right the wrongs in the past. This is a chance to use the skills you have now to fix yesterday’s mistakes. So what you need to do is pick a project from your past.
Analyze what is wrong with your former picture.
Maybe you couldn’t draw like you do now.
Describe your motivation for redoing this project. If you were going to do the gig poster your sense of musical taste may have changed. For example, say you are no longer a fan of Nickleback. So you want to draw something for a band that that is much cooler.
So you will need to give a justification of what you are going to change and why you are going to do it.
Next, you will need to determine what your approach for the new project will be. Will you finger paint?
Will it be digital?
Questions to answer are: is this new approach to this idea appropriate? Does it communicate more effectively than before? Why is this the solution better?