Follow these instructions to quickly make a fast and cool looking paper plane... I used a normal sheet of 8 1/2 by 11 printing paper. (Maybe this is alot simpler than what I put, but I accidentally found this out just messing around with some paper...)
Step 1: Step 1
Lay the sheet down and fold one of the top corners down and unfold it, and then do the same to the other corner.
Step 2: Step 2
Next you fold down where the two creases meet, and unfold.
Step 3: Step 3
Fold the paper vertically now, and unfold it again.
Step 4: Step 4
Fold the two triangular shaped creases in, while folding down on the horizontal crease.
Step 5: Step 5
Now you simply fold along the vertical crease.
Step 6: Step 6
Fold the top flap on both sides a little more than halfway.
Step 7: Step 7
Now fold that part up about halfway (on both sides), to where it lines up with the edge of the paper.
Step 8: Step 8
Now you can tear or cut off that triangle at the top.
Step 9: Final
This is what the final thing should look like... Sorry, but I'm no artist.