Also check out the 5 min demo we put out where I walk thru some sprite basics: https://www.youtube.com/watch?v=7BfTLlwO4hw
I can't say enough how, if you're using this like Kurt and Chris have been, you have like, a dozen sleeping Sprites in your Sprite list. If you're not doing anything with them, they're not really costing you anything. When you want to do something new, there's no point figuring out which of your existing Sprites to do it on. Just make a new one.
Always having a sane place to run anything I happen to be doing, without making any decisions, it's a weird feeling.