No... neither did I till I took a look at a recent blog post from Sheila (here)
I asked her if I could share some of the post here and being the generous person she is... she said okay!
So here is a great tip for getting the most of your dies.
" I also am still experimenting with stretching my dies. I love a square card and have many square images like the one I used today but not many square dies.....at least the square dies I do have are never big enough for most of my images. BUT! I do have lots of fancy rectangular dies.....and it took me the longest time and seeing many examples online before I put it together that other people were retrofitting their rectangular dies to fit a square card. Duh! So, it is a little more futsy than just cutting a die and placing it on the card but in the long run I like the results and more importantly I like that I can use my dies for more than one look! So far I have only used rectangles but think that I can also use other shaped dies for this purpose. My "mind's eye" doesn't see the possibilities right away so it takes me a bit to configure the dies....almost like working with a puzzle.
Today's card uses a large rectangular die from Spellbinders. I cut it down quite a bit to get the square size that I wanted. Then, I matched up the edging design and glued them down. It is really hard to see the "seam" on this die but even so I decided to cover the seam with the ribbon."
Here is the card Sheila created
and this is a card showing the full die that Sheila "retrofitted"