I understand why people advocate writing every day. It’s all about keeping the momentum and building a habit.
If you work on something regularly it stays in your head. Ideas come when you’re in the shower, and when you sit down to work on it again you can plunge straight in; you don’t have to spend half of your previous writing time trying to get back into it or working out where on earth it was going.
As I’ve written elsewhere today, habits stop you having to think. Training your brain to switch to autopilot – it’s 7am; I write at 7am – means you’re more likely to just sit down and begin. And it might just free up a few neurons to come up with creative ideas – even when you’re not in the shower.