Photographers Tip: If you like all those little bokeh circles in the background, try shooting into your light source (in this case, the sun). Not directly into the "ball" of sun; just toward the sun in general. Position your subject (the yellow leaf) between you and the sun. You can tell the sun is behind the leaf because the leaf is backlit. I'm kneeling on the ground and the sun is higher than where I'm shooting (it's about 9:00am). You'll have a bit of haze and maybe a sunflare (which I didn't want in this case), so you have to move around a bit and see if you can block the sun with something like a tree.
(Yeah, I totally see that piece of grass messing up my pretty yellow leaf. You know I don't have the patience to clone that out, right)? ;-)