The title says it all really. Sometimes it is a good idea to shelve a project that you are having trouble with and when you go back to it, it doesn’t look quite so bad. At times I have been able to complete pictures myself that I had previously shelved.
Another tip is to never ever go to bed with a problem in your art work. Always stop before you reach that critical point of ‘I have made a mistake here’.
Always leave the work on a high point.