Fold your paper in half
Fold the two edges into the centre fold then do it a second time and open it all out...
...And you should end up with 8 segments. To make the next steo run smoothly, i recommend you label your segments like i have
1) Fold the paper so that segments 1+2/7+8 are showing
2) Then fold it back on itself so that 5+6/3+4 are showing
Fold segment 1 on top of segment 2 and fold segment 7 on top of segment 8
Turn the model over and fold the corners into the middle
As i think you are aware, there is a second flap...Tuck this second flap in between the layers you made in steps 4+5. Do this on all the other corners
Now turn your model over again and there is a split running through the middle of the model, open this out
define the shape
And TA-DA! you now have a small giftbox/pin-holder/paperclip-holder (or if they're small enough) A glasses case!