Hi, @Jag, Manu covered a lot of good tips already. I only cover my bowls with Glad Cling Wrap (and maybe some foil if they are going to sit for hours), and that does the trick for me. Plastic is a bit permeable, so the added foil can help. (A damp cloth is a cheaper way to go, but I don't use one, for no particular good reason.) And, yes, I usually mix a different consistency/color for each task (as needed), but I only mix and bag them when I am ready to use that icing color/consistency (as it's even harder to prevent drying in tips). As Manu said, I plan out in my head what colors need to go down in what order; then I draw from a large vat of thick white icing and color/adjust consistencies as I go in other, smaller bowls. I usually have no more than a few bags going at a time, because of how I work. And also because . . . I hate to mix tons of colors, so I tend to stick to a few on each cookie! I hope this helps a bit. While you will get faster and more efficient as you learn, cookie decorating is inherently a very time-consuming process, so don't expect to become a speed demon!