If you have never tried the grid method, give it a whirl. I have a hummingbird feeder on my window and a few days ago snapped a photo of this little guy. I decided to try out the grid method (from the colored pencil course) to help me break the photo into small bits, to focus on a section at a time. And wow! The grid method really works great! This is my third colored pencil drawing ever and I can't believe I actually did this.
I've been thinking that I might indeed give the grid method a try, so this is very inspiring. And Mrs Doodler, when you finish your picture, do post it!
I too use the grid method, I draw from pictures off my tablet and I discovered a grid app I can place over a picture. I was so happy to discover this app.