I have read many, many times that a true writer should write every day without fail. It's practice, keeps the creative juices flowing, it's good for you, etc. There's even some that say a real writer absolutely has to write everyday or s/he will feel incomplete. I hate to argue...but I disagree.
For one thing, I don't ever want my writing to feel like a job. It would certainly feel like a job if I forced myself to write. As long as it's fun for me then I feel like it'll show in my writing. When it's not fun, that will show too.
When I'm not writing I'm thinking about things, usually possible plots. If I go ahead and write these plots down then I would simply pick the best one. But if I keep ruminating over them, one would start growing branches and stick, and it's not always the one that I would have originally picked. That's when I know I have the right one. Then it's like a secret. Someone will walk into a room while I'm thinking of my sweet little plot, new characters are forming in my head, and I'll be wearing a smile. "What's up, Lisa?" Smile even bigger. "Nothing."
More thinking...more mysterious smiles.
Months later I have almost an entire novel in my head. This is the way I like it. I've learned that outlining makes me too analytical, writing stuff down immediately doesn't always make for the best story either. And writing something every day, just for the sake of not breaking The Rule, isn't for me. This might be just the thing for you and it's great that you've figured that out. Just don't shove what works for you down my throat and we'll live in perfect cyber-harmony.
So I have absolutely no shame in saying this: Writing, me and you are on a break right now. This doesn't mean I don't like you. It just means that I'm thinking fondly of what I'll be doing with you soon.
Writing rules are so subjective - use your filter wisely.