Karen Bowden, CFWS member, now offers courses online. Her first free course shows how to work on the composition beforehand. Then how to economically transfer it to watercolor paper. You can find the course at Skillshare where you can sign up for free: http://skl.sh/2fNhxIk
At the end of the course, you can see a time lapse of the watercolor painting of two Scrubjays transferred using this technique.