We're into prepping a bathroom for paint. It was very similar to the kitchen. I used a lot of one mil plastic and protected things like the curtains. I wrapped those up, wrapped tape around them, and then put plastic hanging down. I've got blue tape here on this line, of which I'm creating a new line.
The tile is exposed, but I've got my rag handy. And as I'm painting, if I make any larger drips, I can just wipe those off. In general, keep in mind with rolling ceilings, rolling your walls, that little drips of paint are going to try to go everywhere. I put plastic in the bathtub as well with some tape on the side, because I just don't want to have to clean the bathroom when I'm done. So again, it's pretty simple. Protect everything with blue tape and plastic, and consider where any exposed area might be, because paint is going to want to go everywhere. And it will find the place that you leave open. So, go ahead and take your time and protect.