Actually, it doesn't matter what season it is, a hat is always a stylish element. (Refer to one of my recent posts, I Totally Wear Hats, and You Can Too.)
I would wear this beret with something simple like a little black dress and tall black boots.
A good belt can emphasize your shape and create contour in any outfit. I like this wide, stretch belt from Express ($39.90)...
houndstooth scarf from FRAAS similar to the one pictured here. Cashmink is actually 20% finer than cashmere and costs much less (~$30-$40).
As soon as the weather starts getting cooler, I'll take a picture of me sporting the scarf and post it to the Facebook page. It goes great with my Puma houndstooth hat!