Rose Frowned and looked around the kitchen. Had she left her jacket here? She wasn't sure. She hadn't been able to find everything she'd lost, but she needed the jacket. Why was the TARDIS so big, anyway? It was no wonder she could never find anything.

She didn't think she'd left her jacket in the kitchen. But then, she had been pretty sure she hadn't left her shoes under the central console. She wasn't quite sure how they'd gotten there, as she'd never gone under the central console. She'd gotten comfortable wandering through the halls of the TARDIS, but she didn't quite dare to go that far into the Doctor's territory. Except to get her shoes.

She opened a cabinet. She really had no idea why her jacket would be in a kitchen cabinet, but the other day she'd found her favorite pen in the pajama drawer in the wardrobe. She hadn't been in the wardrobe for ages and she had no idea why her pen would have been in there.

She searched through all the cabinets.

The jacket was nowhere to be found.

"Doctor?" she called. "Doctor, have you seen my jacket?"

There was no answer. She ran to the first library (A-Dm) and checked between all seventeen shelves, and in the back aisle. He wasn't there. She did the same in all the other libraries. Nothing.

"Only a hundred other kinds of rooms to check," she said grumpily, and went to the central control room. He was in there often, flipping switches and running around, beaming like a little boy on Christmas Morning, or talking to the TARDIS, or under the console, tinkering with things (and usually getting sparked by an annoyed TARDIS). But he was doing none of these things. Unusual, she thought, but shrugged it off.

It took a lot of nerve to even walk down the hallway she went down next. But even so, she found herself in front of a door she was pretty sure was the Doctor's room. She opened the door. "Doctor? Have you seen my...?"

She glanced around the room. There was no Doctor, but there was her jacket. Another quick look at the things scattered all over the room made her eyes narrow. "Has he been sneaking into my room at night?" Most of the things she hadn't been able to find were strewn about everywhere. She thought about turning the TARDIS inside out and giving him a piece of her mind, then grinned slyly as she came up with something better.

Ten minutes later, Rose was lying on her bed, a notebook on her pillow and the Doctor's sonic screwdriver in her hand. She flicked the bluish light on, and writing appeared across the page.

The Rules of Traveling on the TARDIS

1. The Doctor is always right. Except maybe, occasionally, Rose might be right. MAYBE.

2. The TARDIS likes Rose. If Rose is happy, the TARDIS works better. Rose being happy is a VERY good idea.

3. The best medicine is rest, tea, and Rose. Especially her smile. Or her laughing.

Rose rolled her eyes at the first rule, snorted at the third, and outright laughed at the third. "That may be the sweetest thing I've ever heard him say!" Grinning, she read on.

4. Mothers are dangerous. VERY dangerous. Especially Jackie Tyler.

5. Rose is very soft-hearted. She's a danger to herself. And to entire planets. Don't let Rose near dangerous aliens before they try to kill her. Or after they try to kill her, for that matter.

6. Rose had better not ever get a scratch on her. Or else. Refer to 4 and 5.

Rose giggled a bit. Her mum had slapped the Doctor. Apparently, that qualified her as "Dangerous."

7. If the TARDIS isn't working, get Rose to try. See 2.

8. If Rose says the Doctor needs to rest, listen to her. Even if it's not true. See 1. And 3.

9. Unlike many humans, Rose usually knows what she's talking about. See 8 and 1.

10. The Doctor is in charge. Always. Period. Nobody is more in charge. Except maybe Rose. Sometimes. MAYBE.

Rose laughed at that one, too. The list was over. But something was missing. She didn't have any invisible ink, but she did have her favorite pen, which she was sure the Doctor had hidden. She picked it up and began to write.

11. Rose belongs in the TARDIS with the Doctor, and that's just where she'll stay forever.

She smirked as she hid the notebook and screwdriver under her socks. As much as she wanted the Doctor to read that last rule, she would wait until he found the notebook himself. Humming cheerily, she skipped down the hall to get her jacket.

A/N: Wow, that one was really long! I liked it a lot though, the rules were funny. Thanks to lil sakura haruno for the prompt!

Speaking of prompts, if anyone has a suggestion for one, I'd love to hear it! One- or two-word prompts are great. Don't make it too far out there, but the more random it is, the more challenging it will be for me, and (as this one indicates) the more fun it'll be to write! (Longer, too. :P) I have two ideas left, but they won't take long to write!