If you need to clean up some of your wiring then rounding your IDE cables can help. It makes the cables much smaller and easy to manipulate into small areas to make your case wiring look all pretty.
Step 1: What you need
For this simple project you will only need a
1. IDE Cable or Floppy cable
2. Some kind of knife. I used a X-acto hobby knife.
3. Zip ties
4. Electric tape (optional)
Step 2: Cutting
Get your IDE or floppy cable and cut right in between where the wires are held together. Do it every 2-3 wires. Then pull them apart to the head of the cable.
Step 3: Wrap and zip tie
Twist the cable around until you get a good round cable. Then get your zip ties and put around 3 spaced out depending on how long your cable is.
Step 4: Make them look nicer
Get your electric tape if you had any and just wrap it around the cables.
Step 5: Some other ways to hide your wires
If you have a nice case you should be able to put some wires on the other side of your case door and run them behind the tray of your motherboard.
You can also drill some holes right where the cables go into the sockets and route them behind the motherboard tray also. Be sure to put some kind of grommet or something to protect the sharp hole you cut in your motherboard tray. I would also recommend taking out the motherboard before you do this...