Recently, I have implemented the best system I've found so far to organize my accessories. Here is what I am using:
Earrings: I have so many wonderful earrings that I've found the best way to organize them is put my current favorites, and earrings I wear often in a small jewelry box on my dresser. This box has individual dividers so I can sort the earrings by category (silver/gold, type of stone, etc.).
Here is a look inside the silver box. You can see that I can instantly see the earrings (the box has a window in the lid), and it makes finding what I'm looking for quick and easy. I should note that I only display costume and semi-precious jewelry this way. I have a few good jewelry pieces from my family, but these are kept in a safe since I rarely wear them.
Below you can see the boxes on a shelf that sits just above my dresser. Next to the earring boxes are three red boxes, and an plastic box on top. The box on top holds all my hoop earrings. Below that are boxes for bracelets, watches, and brooches.
To the right of those boxes (above) are three ring trays. You can see an example of one below. I sort my rings by the color of the stones, as well as by silver/gold.
All of the boxes and containers were purchased online at Amazon.com. The other boxes on the top shelf hold miscellaneous jewelry, findings, shoe clips, etc. The large boxes on the top hold make up sponges, etc. The rest of the shelf (to the left) is devoted to make up storage.
My necklaces are stored on a cork board (purchased at Kirklands for $19.99). I use simple pins to hang the necklaces so that I can see what I have.
During summer, I like to wear fabric headbands to hold my hair back when I'm working. (I'm a photographer, and I work outside in the heat.) My headbands are hanging from a small piece of wire shelving, that I have suspended between two of the brackets that hold up the shelf above.
I have used two three bracket coat hook hangers to display my scarves. Yes, I love my scarves! I have used the plastic rings that retailers use to hang scarves to hang the scarves from the hooks, and they are separated by color.
Finally, I have two acrylic nail polish racks (also purchased from Amazon.com) to organize my nail polish. Being able to see what I have, and having them sorted by color, makes finding what I want to use a breeze!
I hope this gives you some good ideas for your own closet organization!