It can be hard figuring out what to do when you reach a certain level of completion, but hopefully I can help! Usually the reason that people become fatigued during a drawing is because they're working with a lack of information. - For example, you don't have any established perspective so trying to add more element in the same space or building upon existing elements can be confusing and extremely difficult which will exhaust you. Simply dropping in a horizon line will instantly give you plenty of information to work off of! I went ahead and drew in a grid for you and some random objects to show you how easy it becomes once I know where my vanishing points are. I hope this helps you finish your future drawings! | Artwod Feedback