Here's an easy wow to spice up your cards. I've seen these before, but didn't realize just how easy they are. The tunnel card technique instructions are below on the technique page I made for my stamp club members.
Here's the front. The whole scene is dusted with Dazzling Diamonds glitter. It didn't show in the photo, so use your imagination...lol. I used Winter Wonderland Specialty paper and the Wonderland stamp set.
And, here's the technique page with a tiny sample tunnel card.