One of the biggest obstacles is to overcome yourself. Do a project that you think you need improving. It might be drawing 15 pages of hands, feet, ears, full figures, color studies or buildings in perspective. Take until the end of the month to complete this one if you need.
As of July it'd be great if everyone kept posting. We will have another themed month in the future. Great job to everyone who participated, stay in touch, and most importantly keep drawing.