Gatefold cards are beautiful for all sorts of invitations and you can completely customize them for your event.  But, how about for an every day card or a Valentine?  You bet.... take a look at this one I made!
I decided to make this card landscape so that it opens top and bottom, but the gatefold cards can work great either way depending on what you're using on the outside.
I gathered my supplies....
The gatefold cards come scored, so there's no measuring and trying to get folds right here.  So I folded my card and then cut my stamp piece and two mats with the Rose Quartz and Lagoon Stardream Metallic cardstock.
I stamped the owl image and the sentiment on the Basis Natural cardstock and then stamped my pennant flags on patterned paper and cut them out.
I assembled my card front, adhering down the banner and adding punched hearts, drawing in the banner line with a brown pen.  I was originally going to add some glitter to the heart, but decided the metallic shine on the cardstock was plenty for me, but you "bling" it up as much as your heart desires!
Time to add the matted image to the gatefold.  You first have to decide if you want it to open from the top or bottom (left or right if you make it a portrait style).  I chose to have mine open from the top, so I added adhesive to just the top half of my matted image.

And there you have it.... this would make a darling Valentine's Day card or a great every day way to be extra sweet to someone special!