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

ok:
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!