DIY "French Tip" style: Stretch a rubberband across the nail. It pulls the skin back too, so I don't get the nail polish everywhere and it's less time consuming than putting on stickers or tape on every finger.
DIY nail art with scrapbooking scissors. I ended up cutting pieces of paper with the scissors and used a gluestick to stick the pieces of paper onto my nail. Works really well, especially when your scissors won't cut the scotch tape properly.