I was hoping to get better pictures before posting this, but that's not going to happen, so here you go. I pulled out some pages from a book I'm getting ready to alter, and spent about half an hour watching tv and cutting out leaf shapes.
I did a water color wash in fall colors, on about 1/5 of the leaves.
I cut some thin paddle wire, (found in the floral department,) into 12 inch lengths and taped one to the back of each leaf.
Then I started twisting the leaves together one by one, like you'd make a traditional greenery garland. How to HERE.