When you feel it's done, it's really done (usually). No more details, haha! I started this as a simple practice, but spent some time on thumbnails and colour choices. It really helped out later on, so I'm glad I did the preliminary work. Other than that, I challenged myself by painting on a single layer, so changing little things and blending got a little tougher in the end (hence I stopped).
I also went to the zoo again today, but since I currently have a short amount of computer availability, I'll probably upload those drawings tomorrow or Monday (although I don't have too many this week).