Case in point:
These sparkly glittery cardboard letters were so easy. I bought the letters at JoAnns (lots of craft stores have them, wait for them to be 40-50% off). I just painted them with plain old acrylic craft paint, sprinkled them with glitter while the paint was still wet, and sealed the glitter with hairspray!
Since the letters aren't heavy at all, I just hung them with sticky 3M hanging strips.
If you're not into bright colors, solid gold or silver would be really pretty too. Or maybe an ombre of colors from white to silver to gold to copper. Oh, or I guess you could do green and red. Haha I forget about that combo! You could also spell "joy" or "merry" too. My daughter begged me to hang it in her room, so I'm thinking I'm going to make another set that spells her name.
If you want another colorful Christmas decor idea, you can also check out my easy mini-garland tutorial here.