I LOVE my SU Sizzix Big Shot die cut machine and lots of alphabet dies I have collected over the years. I use the Sizzix 12" x 12" permanent adhesive sheets on a 12 x 12 sheet of cardstock, and die cut my letters out, then I peel off the red liner sheet and pour glitter on my letters. I cover the letters with a sheet of scrap cardstock and use a rolling pin to embed/burnish my glitter really good onto the adhesive. These adhesive sheets also come in different sizes (6x6) and in removable and permanent. Use the permanent.
Also another easy way is to use the 12 x 12 sheets of pre-glittered cardstocks on the retail market- in January, SU will have have a real pretty red glittered sheet in the new Occasions catalog. (You can't see this online until January 4th) That glittered paper looks "hand-glittered" as well. I will also cut it in my Sizzix.
Some people say they can cut the glittered sheets in their Cricuts, but I like my Sizzix much better, and I have also heard some people say the glittered cardstocks messes up their Cricuts because glitter particles comes off inside their electric cutting machine and its a pain to clean. My Sizzix is manually operated by hand, and cuts using pressure from a steel rolling rod as you crank the die through the machine. (Think pasta machine...LOL) . The glitter does not mess with my dies too bad and is easily cleaned off them with a terry wash cloth.
Stampin' Up! Demonstrator