Cleaning a room (your room) really isn't as hard as you may think or believe.
Just follow these easy steps to completely clean your room.

Step one: The bed
Step two: The Laundry
Step three: The nightstand
Step four: Random stuff
Step five: Dressers and closets
Step six: Bookshelves
Step seven: computer desks
Step eight: The floor

Step 1: Step One: the Bed

Making the bed makes a room look good fairly quickly.

1-Remove stuff from bed, and wash if necessary.
2-Replace and tuck in sheets.
3-Place warming blanket (down or otherwise (unless its summer out)).
4-Place the decorative blanket.

Step 2: Step Two: Laundry

1-Retrieve laundry from around the room
2-Sort in light, dark, colored, and towels/rag piles
3-Send a load down to laundry, and place the rest of the piles on the bed

Step 3: Step Three: the Nightstand

1-Remove items from nightstand, and sort
2-Clean glass/top of stand, and apply a wood-oil if necessary
3-Place sorted items in respectable places, and throw away garbage

Step 4: Step Four: Random Junk

Move random junk to their respective places, and vacuum where they used to be if your going to place them in their original places.

Step 5: Step Five: Dressers and Tabletops

1-Remove and sort items from dresser/table tops
2-Wipe down dresser/table
3-Replace sorted items, and remove garbage

Step 6: Step Six: the Bookshelf

Remove stuff from bookshelf, discard garbage, and sort items into different piles, the ones shown here are:
1-wires/electronics
2-tools/knives
3-magazines
4-school stuff
5-hardback books
6-paperback books
7-product boxes
8-stray CDs
9-Jewel cases
10-pens/pencils
11-packages

Step 7: Step Seven: the Computer Desk

1-Stash headphones, cameras, and other portable electronics
2-Remove garbage and dishes
3-Clean surface of desk

Step 8: Step Eight: the Floor

1-Remove garbage, and sweep floor with a magnet for BBs, and look for nonmagnetic objects
2-Vacuum the floor, starting with rugs, which you should roll up and store on the bed while vacuuming the floor
3-Vacuum the floor, and replace the rugs
4-Use the extension tool for your vacuum to get around edges

Step 9: Step Nine: Relax!

1-Put all the tools you've used to clean your room in their respective places, and go downstairs and get a Coke!
2-Look at your beautifully clean room!