I use my Cuttlebug to die cut shapes into the tape sheet. Punches and other die cut machines would also work. Or you could even cut them by hand. You pour generous amounts of glitter or flock onto your shape. I really press hard on the glitter and flock. Note: if using glass glitter do not use your fingers. Press down with something else. Then you pour your excess back into your container. You simply peel the back off and use like a sticker!
I am really into polka dots right now. I have a super easy way to make velvet or glitter polka dots. Just take your paper and place adhesive dots in a random order. Follow the directions from above and tah dah you have pretty polka dots.
So go get some flock and glitter and have fun creating!