Draw the book your reading.
I love AndyGoldsworthy's work with leaves and the book gives a bit more insight into the processes he uses. Beginning with using only windfall leaves and progressing to testing them at various times of year and finding what each type of leaf wants/ is prepared to do. I particularly like the boxes of london plane and the most basket like of the sweet chestnut structures.
In my own mind some of my explorations of unlikely plant materials for baskets and paper seem a bit less mad -- knitting with couchgrass roots anyone?