How about a way to have a tray full of all the parts you need for the specific model you are building? So you open Workshop, New and have a choice to enter the model / set code and bang, a tray appears at the side with all the parts in, divided into sections, colours etc
Too easy, or shall we just hunt out the parts?

At the moment I feel like I have a good grasp on where the parts are located but some I have to open the Parts window and see what Category they are in, so I don't have to search through with the brick number.